Free AP US History Key Terms: 300 APUSH Flashcards

In APUSH, knowing the label is the easy part; explaining the change is the work.

300 cardsLast updated 2026-08-30

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APUSH terms pile up fast, then start to blur together. You may recognize Columbian Exchange, Carpetbaggers, or Bush v. Gore on sight, then freeze when you have to explain what changed, why it mattered, and how to use the term in a short answer or essay. This deck gives you 300 cards split into colonial-and-revolution (55), early-republic-and-expansion (60), civil-war-and-reconstruction (45), gilded-age-and-progressive (55), depression-war-and-cold-war (50), and modern-america (35). Each card covers a single term, and every back uses the same fields: Meaning, Why it matters, and Example. The cuts follow the course's chronological flow, so you can study by period without losing the links between politics, labor, empire, reform, war, and federal power. On a spaced-repetition schedule, the terms you can explain cleanly stop showing up, while the ones you still mix up keep coming back until you can say more than a label. This deck leaves out long source excerpts and full event summaries on purpose. The point is to make significance and usable evidence automatic, because APUSH rewards being able to say what a term changed, not just when it happened.

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Showing 100 representative cards from the full 300-card deck.

Front	Back
Columbian Exchange	Meaning: The Columbian Exchange was the Atlantic transfer of crops, animals, diseases, and people after European contact. Why it matters: It reshaped population, labor, diet, and ecology in both hemispheres. Example: Smallpox outbreaks among Native peoples.
Spanish mission system	Meaning: The Spanish mission system was a chain of religious settlements meant to convert and control Native peoples. Why it matters: It spread Spanish rule in borderlands and disrupted Native cultures and labor patterns. Example: Junípero Serra.
House of Burgesses	Meaning: The House of Burgesses was Virginia's elected lawmaking assembly. Why it matters: It set an early precedent for representative self-government in English America. Example: George Yeardley.
indentured servitude	Meaning: Indentured servitude was contract labor in exchange for passage, room, and a chance at freedom dues. Why it matters: It supplied much early colonial labor before racial slavery became dominant. Example: Bacon's Rebellion.
mercantilism	Meaning: Mercantilism was the theory that colonies existed to enrich the mother country through controlled trade. Why it matters: It justified British regulation and framed later colonial resistance. Example: Navigation Acts.
French and Indian War	Meaning: The French and Indian War was the North American war between Britain and France and their Native allies. Why it matters: British victory removed France but left debt and tensions that fed the imperial crisis. Example: George Washington at Fort Necessity.
Stamp Act	Meaning: The Stamp Act imposed a direct tax on printed paper in the colonies. Why it matters: It sparked organized protest and the cry against taxation without representation. Example: Stamp Act Congress.
Boston Tea Party	Meaning: The Boston Tea Party was a protest in which patriots dumped East India Company tea into Boston Harbor. Why it matters: It led Britain to punish Massachusetts and pushed colonies toward united resistance. Example: Coercive Acts.
Articles of Confederation	Meaning: The Articles of Confederation created the first U.S. national government with weak central powers. Why it matters: Its limits convinced many leaders that a stronger federal system was needed. Example: Shays's Rebellion.
Shays's Rebellion	Meaning: Shays's Rebellion was an uprising of indebted Massachusetts farmers against taxes and court seizures. Why it matters: It exposed the weakness of the Articles and strengthened calls for a new Constitution. Example: Daniel Shays.
Pueblo Revolt	Meaning: A 1680 uprising by Pueblo peoples that drove the Spanish out of New Mexico for about twelve years. Why it matters: It proved Native resistance could disrupt colonization and pushed Spain to rule the region less harshly after returning. Example: Popé.
Mayflower Compact	Meaning: An agreement by Plymouth settlers to form a civil government and obey laws made for the colony. Why it matters: It became an early model of self-government based on the consent of the governed. Example: William Bradford.
Half-Way Covenant	Meaning: A Puritan policy that allowed partial church membership for children of baptized but unconverted adults. Why it matters: It reflected declining religious zeal and helped churches keep influence in New England. Example: The Massachusetts synod of 1662.
Salutary neglect	Meaning: Britain's loose enforcement of colonial trade rules before the 1760s. Why it matters: It gave colonists room to practice self-rule and made later imperial control more contentious. Example: Robert Walpole.
Iroquois Confederacy	Meaning: An alliance of Native nations in the Northeast that used diplomacy and war to defend its interests. Why it matters: It shaped the balance of power among Britain, France, and Native peoples in the interior. Example: The Covenant Chain.
Treaty of Utrecht	Meaning: The peace settlement that ended Queen Anne's War and transferred some French possessions to Britain. Why it matters: It strengthened Britain in North America and redrew imperial boundaries. Example: The asiento contract.
Townshend Acts	Meaning: Parliamentary duties on imported goods such as glass, lead, paint, paper, and tea. Why it matters: They revived resistance and encouraged nonimportation and wider colonial cooperation. Example: Letters from a Farmer in Pennsylvania.
Intolerable Acts	Meaning: Punitive laws passed after the Boston Tea Party that closed Boston's port and tightened control of Massachusetts. Why it matters: They convinced many colonists that British policy threatened self-government across America. Example: The Boston Port Act.
Constitutional Convention	Meaning: The Philadelphia meeting that drafted a new national framework instead of revising the Articles. Why it matters: It produced the Constitution and increased the power of the national government. Example: George Washington.
New Jersey Plan	Meaning: A proposal for a stronger union that kept equal representation for each state. Why it matters: It defended small-state interests and pushed delegates toward compromise. Example: William Paterson.
Dominion of New England	Meaning: A crown-run union of several New England and mid-Atlantic colonies created to tighten English control over colonial trade and politics. Why it matters: It showed early imperial centralization and deepened colonial suspicion of arbitrary rule before the 1700s crises. Example: Sir Edmund Andros enforced the dominion until colonists overthrew his government after the Glorious Revolution.
Battle of Quebec	Meaning: A 1759 British victory on the Plains of Abraham that led to the capture of France's key stronghold in Canada. Why it matters: It crippled French power in North America and helped make Britain the dominant empire there. Example: Generals James Wolfe and Louis-Joseph de Montcalm both died in the fighting.
Federalist Party	Meaning: A political party that favored a strong national government, commercial growth, and loose construction of the Constitution. Why it matters: It formed one side of the first party system and pushed policies that expanded federal fiscal power. Example: Alexander Hamilton.
Jacksonian democracy	Meaning: A political style that expanded white male participation and celebrated the common man while concentrating power in the presidency. Why it matters: It widened electoral politics for many white men but excluded women, Native Americans, and most Black Americans. Example: Election of 1828.
Indian Removal Act	Meaning: An 1830 law authorizing the president to exchange tribal homelands in the Southeast for land west of the Mississippi. Why it matters: It advanced white settlement by forcing Native peoples off valuable land. Example: Trail of Tears.
Marbury v. Madison	Meaning: A Supreme Court case that established judicial review, the power to strike down unconstitutional federal laws. Why it matters: It made the Court a coequal branch able to shape national policy. Example: John Marshall.
Gibbons v. Ogden	Meaning: A Supreme Court case that gave Congress broad authority over interstate commerce. Why it matters: It limited state monopolies and boosted a national market. Example: Steamboat trade between New York and New Jersey.
Market Revolution	Meaning: A period of rapid economic change marked by improved transport, expanding markets, and more wage labor. Why it matters: It linked regional economies, increased productivity, and changed work and family life. Example: Lowell mills.
American System	Meaning: Henry Clay's program of protective tariffs, a national bank, and internal improvements. Why it matters: It promoted economic development by tying western farms, northern industry, and federal policy together. Example: Henry Clay.
Second Great Awakening	Meaning: A Protestant revival movement that stressed personal salvation and moral improvement. Why it matters: It energized reform campaigns by teaching that individuals could help perfect society. Example: Charles Grandison Finney.
Temperance movement	Meaning: A reform campaign urging reduced alcohol use or complete abstinence. Why it matters: It reflected changing ideas about self-control, family order, and social reform. Example: American Temperance Society.
Manifest Destiny	Meaning: The belief that the United States was destined to expand across North America. Why it matters: It justified expansionist policy and deepened conflict over slavery in new territories. Example: John L. O'Sullivan.
Missouri Compromise	Meaning: An 1820 settlement that admitted Missouri slave and Maine free, and barred slavery north of 36°30′ in the rest of the Louisiana Purchase. Why it matters: It temporarily preserved sectional balance and showed how dangerous the slavery issue had become. Example: Maine entered the Union as a free state.
Hamilton's financial plan	Meaning: Alexander Hamilton's program funded national and state debts, created a national bank, and encouraged manufacturing. Why it matters: It expanded federal economic power and sharpened the split between Federalists and Democratic-Republicans. Example: The First Bank of the United States.
Democratic Party	Meaning: The Democratic Party emerged around Andrew Jackson and favored limited government and mass political participation for white men. Why it matters: It built a durable national party organization and defined Jacksonian politics. Example: Andrew Jackson.
Marshall Court	Meaning: The Marshall Court was the Supreme Court under Chief Justice John Marshall, noted for broad readings of federal power. Why it matters: It strengthened national authority and supported a stable legal climate for commerce and contracts. Example: John Marshall.
Cohens v. Virginia	Meaning: Cohens v. Virginia held that the Supreme Court could review state court cases involving federal law. Why it matters: It increased federal judicial supremacy over the states. Example: The Cohen brothers' lottery case.
steamboat	Meaning: A steamboat was a steam-powered vessel that moved people and goods quickly on rivers. Why it matters: It accelerated western trade and helped integrate regional markets. Example: Robert Fulton's Clermont.
cotton gin	Meaning: The cotton gin was a machine that quickly removed seeds from short-staple cotton. Why it matters: It made cotton more profitable and deepened slavery's expansion in the South. Example: Eli Whitney.
Dorothea Dix	Meaning: Dorothea Dix was a reformer who campaigned for humane treatment of the mentally ill. Why it matters: Her activism pushed states to build and improve public mental hospitals. Example: Dix's memorial to the Massachusetts legislature.
Declaration of Sentiments	Meaning: The Declaration of Sentiments was the statement issued at Seneca Falls that demanded equal rights for women. Why it matters: It framed women's rights as a public demand for legal and political equality. Example: Elizabeth Cady Stanton.
Wilmot Proviso	Meaning: The Wilmot Proviso proposed banning slavery in any territory acquired from Mexico. Why it matters: It made the expansion of slavery the central sectional issue in national politics. Example: David Wilmot.
Era of Good Feelings	Meaning: A post-War of 1812 period when the Federalists faded and one-party Republican rule masked growing national and sectional tensions. Why it matters: It marks the collapse of the first party system and shows that conflict over banks, tariffs, and slavery survived even without two strong parties. Example: James Monroe's national tour in 1817.
Panic of 1819	Meaning: The first major U.S. financial depression, caused by tight credit, falling crop prices, and a collapse in land speculation. Why it matters: It increased distrust of banks and elites and sharpened arguments over how active the national government should be in the economy. Example: The Second Bank called in many western loans.
American Colonization Society	Meaning: A reform organization that sought to resettle free Black Americans in Africa, especially in Liberia. Why it matters: It revealed the limits of white antislavery sentiment and drew strong opposition from many Black activists. Example: Henry Clay was a prominent supporter.
Adams-Onís Treaty	Meaning: An 1819 treaty in which Spain ceded Florida to the United States and fixed a boundary from the Gulf to the Pacific. Why it matters: It expanded U.S. control in the Southeast and clarified claims that later shaped continental expansion. Example: Andrew Jackson's incursions into Florida increased pressure on Spain.
Positive good theory	Meaning: Proslavery claim that slavery benefited southern society and supposedly protected and civilized enslaved people. Why it matters: It turned slavery from a tolerated evil into a cause to defend and expand, making sectional compromise harder. Example: John C. Calhoun.
Uncle Tom's Cabin	Meaning: Harriet Beecher Stowe's novel that depicted the human suffering and family breakup caused by slavery. Why it matters: It widened northern antislavery feeling and made slavery a moral issue for readers far from the South. Example: Harriet Beecher Stowe.
Fugitive Slave Act	Meaning: Federal law that forced officials and citizens to aid in capturing runaways and denied accused fugitives jury trials. Why it matters: It nationalized slave catching and pushed many northerners from indifference toward resistance. Example: Anthony Burns.
Secession	Meaning: A state's declared withdrawal from the Union and rejection of federal authority. Why it matters: It destroyed the existing political union and led southern states to form the Confederacy. Example: South Carolina.
Emancipation Proclamation	Meaning: Lincoln's wartime order declaring enslaved people in rebelling areas free. Why it matters: It made abolition a Union war aim and opened the army to Black soldiers. Example: Abraham Lincoln.
Presidential Reconstruction	Meaning: Andrew Johnson's lenient plan for readmitting former Confederate states after the war. Why it matters: It restored southern elites quickly and helped trigger a clash with Congress. Example: Andrew Johnson.
Freedmen's Bureau	Meaning: Federal agency that aided freedpeople with food, schools, labor contracts, and legal help. Why it matters: It marked a major expansion of federal responsibility after slavery ended. Example: Oliver O. Howard.
Reconstruction Acts	Meaning: Laws that put the South under military districts and required new constitutions with Black male suffrage. Why it matters: They replaced Johnson's approach and created biracial governments in the South. Example: the five military districts.
Fifteenth Amendment	Meaning: Amendment barring denial of the vote because of race, color, or previous servitude. Why it matters: It established Black male suffrage in principle and enlarged federal responsibility for voting rights. Example: Hiram Revels.
Paternalism	Meaning: A proslavery belief that masters acted as protectors over enslaved people, who were cast as dependent and childlike. Why it matters: It defended slavery as humane and natural, helping slaveholders answer abolitionist criticism. Example: George Fitzhugh argued that enslavers cared for dependents better than Northern employers did.
Peculiar institution	Meaning: A common Southern euphemism for slavery that framed it as a special regional social system. Why it matters: The phrase normalized slavery in politics and softened its brutality in public language. Example: John C. Calhoun often used the term in defending Southern society.
George Fitzhugh	Meaning: A Virginia writer who defended slavery as beneficial and attacked free labor as exploitative. Why it matters: His books gave proslavery thinkers an aggressive ideological case against Northern capitalism. Example: Cannibals All! claimed wage workers were worse off than slaves.
Fire-Eaters	Meaning: Southern extremists who urged secession and rejected compromise with the North. Why it matters: They pushed Deep South politics toward disunion after Lincoln's election. Example: Robert Barnwell Rhett was a leading Fire-Eater.
Border states	Meaning: Slave states that stayed in the Union during the Civil War. Why it matters: Keeping them denied the Confederacy key resources and shaped Lincoln's early caution on slavery. Example: Maryland remained in the Union.
Contraband	Meaning: A Union term for enslaved people who escaped to Union lines and were not returned to enslavers. Why it matters: The policy weakened slavery and pushed the war toward emancipation before 1863. Example: Benjamin Butler first used the policy at Fort Monroe.
Carpetbaggers	Meaning: A Southern label for Northerners who moved South during Reconstruction to work, invest, or enter politics. Why it matters: The term was used to portray Reconstruction governments as illegitimate outside rule. Example: Adelbert Ames became a Republican leader in Mississippi.
Sharecropping	Meaning: A labor system in which farmers worked land they did not own and paid the owner with a share of the crop. Why it matters: It kept many freedpeople and poor whites in debt and limited the economic gains of emancipation. Example: Cotton tenants often settled through furnishing merchants.
Copperheads	Meaning: Northern Democrats who opposed Lincoln's war policies and favored a negotiated peace with the Confederacy. Why it matters: They show that the Union faced strong internal dissent during the war, not just military resistance from the South. Example: Clement Vallandigham
Vertical integration	Meaning: A business strategy in which one company controls several stages of production and distribution. Why it matters: It helped giant firms lower costs and dominate markets, fueling concern over concentrated corporate power. Example: Carnegie Steel.
New Immigrants	Meaning: Immigrants mainly from southern and eastern Europe who arrived in large numbers after 1880. Why it matters: They reshaped urban America and fueled nativism and demands for immigration restriction. Example: Ellis Island.
Dawes Act	Meaning: A law that divided tribal land into individual allotments and opened the rest to white settlement. Why it matters: It aimed at assimilation and caused Native communities to lose large amounts of land. Example: Henry L. Dawes.
Muckrakers	Meaning: Journalists and writers who exposed corruption, monopoly power, and social abuses. Why it matters: Their investigations built public support for Progressive regulation and reform. Example: Ida Tarbell.
Spanish-American War	Meaning: A short war in which the United States defeated Spain and won overseas possessions. Why it matters: It marked a turning point toward imperial expansion and greater global influence. Example: Treaty of Paris of 1898.
Bessemer process	Meaning: The Bessemer process was a steelmaking method that blew air through molten iron to remove impurities quickly. Why it matters: It made cheap mass steel possible, fueling railroads, skyscrapers, and factory expansion. Example: Andrew Carnegie used Bessemer steel to build a giant steel empire.
Haymarket affair	Meaning: The Haymarket affair was a Chicago labor rally that turned deadly after a bomb exploded and police fired. Why it matters: It made many Americans link labor radicalism with violence and weakened support for unions. Example: Albert Parsons was tried after the Haymarket bombing.
Wounded Knee	Meaning: Wounded Knee was the massacre of Lakota people by U.S. troops after tensions around the Ghost Dance. Why it matters: It symbolized the violent end of armed Native resistance on the Great Plains. Example: The 7th Cavalry carried out the killings at Wounded Knee.
Direct primary	Meaning: A direct primary lets party voters choose nominees instead of leaving the choice to party leaders. Why it matters: It weakened machine control and broadened participation in nominations. Example: Robert La Follette pushed the reform in Wisconsin.
Platt Amendment	Meaning: The Platt Amendment set conditions on Cuban independence and gave the United States the right to intervene there. Why it matters: It showed that U.S. victory over Spain created informal empire, not full Cuban sovereignty. Example: It supported creation of the U.S. naval base at Guantanamo Bay.
Transcontinental railroad	Meaning: A rail line completed in 1869 that linked eastern rail networks with the Pacific coast. Why it matters: It sped western settlement and national markets and showed how federal aid could fuel big business growth. Example: Promontory Summit and the golden spike ceremony.
Harlem Renaissance	Meaning: A flowering of Black literature, music, and art centered in Harlem in the 1920s. Why it matters: It asserted Black cultural pride and showed how the Great Migration reshaped urban America. Example: Langston Hughes.
buying on margin	Meaning: The practice of purchasing stock with borrowed money while paying only part of the price upfront. Why it matters: It fueled speculation and helped make the stock market crash more destructive. Example: In the late 1920s, investors often bought stocks with only a small down payment and borrowed the rest from brokers.
Dust Bowl	Meaning: A series of severe dust storms on the Great Plains caused by drought and overfarming. Why it matters: It devastated farm families and intensified migration during the Depression. Example: Dorothea Lange.
Social Security Act	Meaning: A New Deal law that created old-age pensions, unemployment insurance, and aid for some vulnerable groups. Why it matters: It made the federal government responsible for a basic safety net. Example: Frances Perkins.
Lend-Lease Act	Meaning: A law allowing the United States to supply Allied nations with war materials before direct entry into World War II. Why it matters: It marked a decisive shift away from neutrality and toward aiding Britain and other Allies. Example: Aid to Great Britain.
Manhattan Project	Meaning: The secret US-led effort to build the first atomic bombs. Why it matters: It ushered in the nuclear age and shaped the end of the war and the Cold War. Example: J. Robert Oppenheimer.
containment	Meaning: A foreign policy aimed at stopping the spread of communism rather than overturning it everywhere by force. Why it matters: It guided US actions across Europe, Asia, and later the developing world. Example: George F. Kennan.
Korean War	Meaning: A war between communist North Korea and South Korea, fought with US-led UN forces and Chinese intervention. Why it matters: It turned containment into a major shooting war and expanded presidential war-making in the Cold War. Example: Inchon landing.
Levittown	Meaning: A mass-produced suburban housing development that became a model for postwar suburbia. Why it matters: It reflected the growth of car-centered suburbs and unequal access to homeownership. Example: William Levitt.
mass production	Meaning: Mass production is the use of standardized parts and assembly methods to make goods quickly and cheaply. Why it matters: It lowered prices and spread consumer goods, helping create a national consumer economy. Example: Henry Ford used the moving assembly line to build Model Ts.
Bonus Army	Meaning: The Bonus Army was a group of World War I veterans who demanded early payment of promised bonuses during the Depression. Why it matters: Their treatment hurt Hoover politically and deepened public anger at federal inaction. Example: General Douglas MacArthur helped clear the veterans' camp in Washington.
Agricultural Adjustment Act	Meaning: The Agricultural Adjustment Act paid farmers to cut production in order to raise crop prices. Why it matters: It marked major federal intervention in agriculture during the New Deal. Example: United States v. Butler struck down the first AAA.
court-packing plan	Meaning: The court-packing plan was Roosevelt's proposal to add up to six Supreme Court justices for older members who did not retire. Why it matters: It showed the limits of New Deal power and raised fears about executive overreach. Example: The Judiciary Reorganization Bill carried the proposal.
Bracero Program	Meaning: The Bracero Program brought Mexican laborers to the United States on temporary contracts during labor shortages. Why it matters: It met wartime labor needs and reshaped migration patterns between the two countries. Example: The Mexican Farm Labor Agreement began the program.
Berlin Airlift	Meaning: The Berlin Airlift was the American and British effort to supply West Berlin by air after a Soviet blockade. Why it matters: It showed U.S. resolve to resist Soviet pressure without direct war. Example: Operation Vittles was the U.S. airlift effort.
domino theory	Meaning: The domino theory was the belief that one country's fall to communism would trigger neighboring countries to fall as well. Why it matters: It justified U.S. intervention in Asia and elsewhere during the Cold War. Example: Eisenhower used the idea in a news conference about Indochina.
Brown v. Board of Education	Meaning: A Supreme Court ruling that struck down state-mandated segregation in public schools as unconstitutional. Why it matters: It overturned school segregation's legal basis and energized the modern civil rights movement. Example: Little Rock Nine.
Voting Rights Act	Meaning: A federal law that outlawed literacy tests and other devices used to suppress minority voting. Why it matters: It sharply expanded Black political participation in the South through federal enforcement. Example: Selma to Montgomery march.
Gulf of Tonkin Resolution	Meaning: A congressional resolution that let President Johnson use force in Southeast Asia without a war declaration. Why it matters: It widened presidential war-making power and sped the escalation of the Vietnam War. Example: USS Maddox incident.
Watergate	Meaning: The scandal triggered by a break-in tied to Nixon's reelection effort and the cover-up that followed. Why it matters: It deepened public distrust of government and forced the first presidential resignation. Example: United States v. Nixon.
détente	Meaning: A period of eased tensions and negotiation between the United States and the Soviet Union. Why it matters: It showed Cold War rivalry could be managed through arms control and diplomacy. Example: SALT I.
Affordable Care Act	Meaning: A federal health reform law that expanded insurance coverage through subsidies, exchanges, and Medicaid. Why it matters: It produced the biggest health policy change since the 1960s and became a major partisan fight. Example: NFIB v. Sebelius.
My Lai Massacre	Meaning: The My Lai Massacre was the 1968 killing of Vietnamese civilians by U.S. soldiers in a South Vietnamese village. Why it matters: It deepened public distrust of the war and strengthened claims that U.S. tactics had become immoral and brutal. Example: Lt. William Calley was convicted for his role.
INF Treaty	Meaning: The INF Treaty was a 1987 U.S.-Soviet agreement that eliminated intermediate-range nuclear missiles. Why it matters: It marked a major easing of Cold War tensions and showed that Reagan and Gorbachev could reach real arms limits. Example: Ronald Reagan and Mikhail Gorbachev signed it in Washington.
Bush v. Gore	Meaning: Bush v. Gore was the 2000 Supreme Court decision that stopped Florida's recount and effectively awarded the presidency to George W. Bush. Why it matters: It showed how closely divided elections could be settled by the courts and intensified arguments about voting rules and legitimacy. Example: The dispute centered on hanging chads and ballot counting in Florida.

Frequently asked

How is this deck split across the course?

It is divided into colonial-and-revolution (55), early-republic-and-expansion (60), civil-war-and-reconstruction (45), gilded-age-and-progressive (55), depression-war-and-cold-war (50), and modern-america (35).

What do the backs of these APUSH cards look like?

Every card uses the same back fields: Meaning, Why it matters, and Example. That format trains you to define the term, explain its significance, and attach it to something concrete you can use in writing.

Why does the deck include terms as far apart as Columbian Exchange, Carpetbaggers, and Bush v. Gore?

Because APUSH is easiest to remember when you study change across the full course instead of treating each period as sealed off. Keeping the same card format from colonization through modern America makes comparison much easier.

Can I import the whole deck on the free plan?

Yes. Importing a saved deck runs no new AI generation and spends no AI credits, so the free plan imports all 300 cards. You can study, edit and delete them afterwards.

Will importing it twice create duplicates?

No. Cards you already have are skipped and only cards added in a revision come through. Including re-imports after deleting it, one official deck can be imported three times per account.

Can I use it on the web and in the mobile app?

Yes. The deck is added to your account rather than to a device, so the same cards and the same progress are there on the web, on iOS and on Android.

Can I edit the cards after importing?

Yes. Imported cards are yours: you can edit both sides, delete cards you do not need, change tags, and move cards to another deck.