Key_Dates_and_Core_Contexts_in_U.S.-American_History

Adena culture

A seminal post-Archaic indigenous civilization in the Ohio region around 800 BC–100 AD.

Hopewell tradition

A widely dispersed native culture in the Midwest connected by trade routes and cultural exchange from 100 BC–500 AD.

Cahokia

The largest city and religious center of the indigenous Mississippian culture, spanning from Southeastern through Midwestern regions (900–1450).

Leif Erikson

Probably the first European to set foot on continental North America, establishing a temporary settlement in Newfoundland around 1000.

Iroquois Federation

Formed in the Northeast in 1450, this group was a powerful alliance of six Native American nations.

Spanish explorers

Brought the first African slaves to present-day South Carolina in 1526, marking the start of African slavery in the English colonies.

Jamestown, Virginia

The first permanent English settlement in the Americas, established in 1607 by explorers and adventurers.

Plymouth Plantation

Founded in 1620 by Pilgrims, religious separatists from England, after landing at Cape Cod.

Massachusetts Bay Colony

Founded by Puritan settlers in 1630 at Boston, leading to a large influx of English colonists.

Pequot War

An early major armed conflict between an indigenous tribe and New England colonists in 1637.

Ann Hutchinson

Banished from Massachusetts Bay Colony in 1638 for challenging Puritan beliefs.

Philadelphia Library Company

The first public library in the colonies, founded by Benjamin Franklin in 1731.

Treaty of Paris 1763

A treaty confirming England's imperial dominance in North America and restricting colonists' westward expansion.

Boston Tea Party

A protest in 1773 by colonists against British tax policies, where tea was dumped into Boston Harbor.

Declaration of Independence

Adopted on July 4, 1776, declaring the Thirteen Colonies as sovereign states free from British rule.

U.S. Constitution

Became effective in 1789 after a national ratification debate and established the framework for American government.

Louisiana Purchase

A land deal in 1803 where the U.S. acquired Louisiana territory from France, nearly doubling the country's size.

War of 1812

A conflict against Great Britain from 1812 to 1815 that fostered American national identity.

Missouri Compromise

A federal legislation in 1820 admitting Missouri as a slave state and Maine as a free state.

Monroe Doctrine

Articulated in 1823, it warned European powers against colonial ventures in the Western Hemisphere.

Indian Removal Act

Passed by Congress in 1830, forcibly relocating Native American nations west of the Mississippi River.

Emancipation Proclamation

Declared on January 1, 1863, it freed enslaved African Americans in Confederate-held territories.

Reconstruction Era

The period from 1865–77 in which civil rights and racial tensions were prominent in the post-Civil War South.

Brown v. Board of Education

The 1954 Supreme Court decision declaring segregated schools unconstitutional.

Civil Rights Act of 1964

Legislation prohibiting discrimination based on race, color, religion, sex, or national origin.

Black Lives Matter movement

A social movement formed in 2013 advocating against violence and systemic racism towards African Americans.

Nineteenth Amendment

Amendment ratified in 1920 granting women the right to vote in the United States.

Watergate Scandal

A political scandal in the early 1970s that led to President Nixon's resignation.