Native American and European settlement
The 
indigenous peoples of the U.S. mainland, including 
Alaska Natives, are believed to have 
migrated from Asia, beginning between 40,000 and 12,000 years ago.
[32] Some, such as the 
pre-Columbian Mississippian culture, developed advanced agriculture, grand architecture, and state-level societies. After 
Europeans began settling the Americas, 
many millions of indigenous Americans died from epidemics of imported diseases such as smallpox.
[33]
In 1492, 
Genoese explorer 
Christopher Columbus, under contract to the Spanish crown, reached several Caribbean islands, making 
first contact with the indigenous people. On April 2, 1513, Spanish conquistador 
Juan Ponce de León landed on what he called "
La Florida"—the
 first documented European arrival on what would become the U.S. 
mainland. Spanish settlements in the region were followed by ones in the
 present-day 
southwestern United States that drew thousands through Mexico. French fur traders established outposts of 
New France
 around the Great Lakes; France eventually claimed much of the North 
American interior, down to the Gulf of Mexico. The first successful 
English settlements were the 
Virginia Colony in 
Jamestown in 1607 and the 
Pilgrims' 
Plymouth Colony in 1620. The 1628 chartering of the 
Massachusetts Bay Colony resulted in a wave of migration; by 1634, 
New England had been settled by some 10,000 
Puritans. Between the late 1610s and the American Revolution, about 50,000 convicts were shipped to Britain's American colonies.
[34] Beginning in 1614, the Dutch settled along the lower 
Hudson River, including 
New Amsterdam on 
Manhattan Island.
In 1674, the Dutch ceded their American territory to England; the province of 
New Netherland was renamed New York. Many new immigrants, especially to 
the South, were indentured servants—some two-thirds of all Virginia immigrants between 1630 and 1680.
[35] By the turn of the 18th century, 
African slaves were becoming the primary source of bonded labor. With the 1729 division of 
the Carolinas and the 1732 colonization of 
Georgia, the 
thirteen British colonies
 that would become the United States of America were established. All 
had local governments with elections open to most free men, with a 
growing devotion to the ancient 
rights of Englishmen and a sense of self-government stimulating support for republicanism. All legalized the 
African slave trade. With high birth rates, low death rates, and steady immigration, the colonial population grew rapidly. The 
Christian revivalist movement of the 1730s and 1740s known as the 
Great Awakening fueled interest in both religion and religious liberty. In the 
French and Indian War, British forces seized Canada from the French, but the 
francophone population remained politically isolated from the southern colonies. Excluding the 
Native Americans
 (popularly known as "American Indians"), who were being displaced, 
those thirteen colonies had a population of 2.6 million in 1770, about 
one-third that of Britain; nearly one in five Americans were black 
slaves.
[36] Though 
subject to British taxation, the American colonials had no representation in the 
Parliament of Great Britain.
 Independence and expansion
Tensions between American colonials and the British during the 
revolutionary period of the 1760s and early 1770s led to the 
American Revolutionary War, fought from 1775 to 1781. On June 14, 1775, the 
Continental Congress, convening in 
Philadelphia, established a 
Continental Army under the command of 
George Washington. Proclaiming that "
all men are created equal" and endowed with "certain 
unalienable Rights", the Congress adopted the 
Declaration of Independence, drafted largely by 
Thomas Jefferson, on July 4, 1776. That date is now celebrated annually as America's 
Independence Day. In 1777, the 
Articles of Confederation established a weak 
confederal government that operated until 1789.
After the 
British defeat by American forces 
assisted by the French and 
Spanish, Great Britain 
recognized the independence of the United States and the states' sovereignty over American territory west to the 
Mississippi River. Those wishing to establish a strong federal government with powers of taxation organized a 
constitutional convention in 1787. The 
United States Constitution was ratified in 1788, and the new republic's 
first Senate, House of Representatives, and 
president—George Washington—took office in 1789. The 
Bill of Rights, forbidding federal restriction of 
personal freedoms and guaranteeing a range of legal protections, was adopted in 1791.
Attitudes toward 
slavery were shifting; a 
clause in the Constitution protected the 
Atlantic slave trade only until 1808. The Northern states abolished slavery between 1780 and 1804, leaving the 
slave states of the South as defenders of the "
peculiar institution". The 
Second Great Awakening, beginning about 1800, made 
evangelicalism a force behind various social reform movements, including 
abolitionism.
 
Territorial acquisitions by date
 
 
 
Americans' eagerness to 
expand westward prompted a long series of 
Indian Wars. The 
Louisiana Purchase of French-claimed territory under President Thomas Jefferson in 1803 almost doubled the nation's size.
[37] The 
War of 1812,
 declared against Britain over various grievances and fought to a draw, 
strengthened U.S. nationalism. A series of U.S. military incursions into
 Florida led 
Spain to cede it and other Gulf Coast territory in 1819. The 
Trail of Tears in the 1830s exemplified the 
Indian removal policy that stripped the native peoples of their land. The United States annexed the 
Republic of Texas in 1845, amid a period when the concept of 
Manifest Destiny was becoming popular.
[38] The 1846 
Oregon Treaty with Britain led to U.S. control of the present-day 
American Northwest. The U.S. victory in the 
Mexican-American War resulted in the 
1848 cession of 
California and much of the present-day 
American Southwest. The 
California Gold Rush of 1848–49 further spurred western migration. 
New railways made relocation easier for settlers and increased conflicts with Native Americans. Over a half-century, up to 40 million 
American bison,
 or buffalo, were slaughtered for skins and meat and to ease the 
railways' spread. The loss of the buffalo, a primary resource for the 
plains Indians, was an existential blow to many native cultures.
 Civil War and industrialization
Tensions between 
slave and free states mounted with arguments about the relationship between the 
state and federal governments, as well as 
violent conflicts over the spread of slavery into new states. 
Abraham Lincoln, candidate of the largely antislavery 
Republican Party,
 was elected president in 1860. Before he took office, seven slave 
states declared their secession—which the federal government maintained 
was illegal—and formed the 
Confederate States of America. With the Confederate 
attack upon Fort Sumter, the 
Civil War began and four more slave states joined the Confederacy. Lincoln's 
Emancipation Proclamation in 1863 declared slaves in the Confederacy to be free. Following the 
Union victory in 1865, three amendments to the U.S. Constitution 
ensured freedom for the nearly four million 
African Americans who had been slaves,
[39] made them citizens, and 
gave them voting rights. The war and its resolution led to a substantial increase in 
federal power.
[40] The war remains the deadliest conflict in American history, resulting in the deaths of 620,000 soldiers.
[41]
After the war, the 
assassination of Abraham Lincoln radicalized Republican Reconstruction
 policies aimed at reintegrating and rebuilding the Southern states 
while ensuring the rights of the newly freed slaves. The resolution of 
the disputed 
1876 presidential election by the 
Compromise of 1877 ended Reconstruction; 
Jim Crow laws soon 
disenfranchised many African Americans. In the North, urbanization and an unprecedented 
influx of immigrants from Southern and Eastern Europe hastened the 
country's industrialization.
 The wave of immigration, lasting until 1929, provided labor and 
transformed American culture. National infrastructure development 
spurred economic growth. The 1867 
Alaska Purchase from Russia completed the country's mainland expansion. The 
Wounded Knee Massacre in 1890 was the last major armed conflict of the Indian Wars. In 1893, the 
indigenous monarchy of the Pacific 
Kingdom of Hawaii was overthrown in a coup led by American residents; the United States annexed the archipelago in 1898. Victory in the 
Spanish–American War the same year demonstrated that the United States was a 
world power and led to the annexation of Puerto Rico, Guam, and the 
Philippines.
[42] The Philippines gained independence a half-century later; Puerto Rico and Guam remain U.S. territories.
 World War I, Great Depression, and World War II
At the outbreak of World War I in 1914, the United States remained 
neutral. Most Americans sympathized with the British and French, 
although many opposed intervention.
[43] In 1917, the United States joined the 
Allies, and the 
American Expeditionary Forces helped to turn the tide against the 
Central Powers. After the war, the Senate did not ratify the 
Treaty of Versailles, which established the 
League of Nations. The country pursued a policy of unilateralism, verging on 
isolationism.
[44] In 1920, the women's rights movement won passage of a 
constitutional amendment granting 
women's suffrage. The prosperity of the 
Roaring Twenties ended with the 
Wall Street Crash of 1929 that triggered the 
Great Depression. After his election as president in 1932, 
Franklin D. Roosevelt responded with the 
New Deal, a range of policies increasing government intervention in the economy, including the establishment of the 
Social Security system.
[45] The 
Dust Bowl of the mid-1930s impoverished many farming communities and spurred a new wave of western migration.
The United States, effectively neutral during 
World War II's early stages after Nazi Germany's 
invasion of Poland in September 1939, began supplying materiel to the 
Allies in March 1941 through the 
Lend-Lease program. On December 7, 1941, the Empire of Japan launched a surprise 
attack on Pearl Harbor, prompting the United States to join the Allies against the 
Axis powers as well as the 
internment of Japanese Americans by the thousands.
[46]
 Participation in the war spurred capital investment and industrial 
capacity. Among the major combatants, the United States was the only 
nation to become richer—indeed, far richer—instead of poorer because of 
the war.
[47] Allied conferences at 
Bretton Woods and 
Yalta outlined a new system of international organizations that placed the 
United States and 
Soviet Union at the center of world affairs. As 
victory was won in Europe, a 1945 
international conference held in 
San Francisco produced the 
United Nations Charter, which became active after the war.
[48] The United States, having 
developed the first nuclear weapons, used them on the Japanese cities of 
Hiroshima and Nagasaki in August. 
Japan surrendered on September 2, ending the war.
[49]
 Cold War and protest politics
The United States and the Soviet Union jockeyed for power after World War II during the 
Cold War, dominating the military affairs of Europe through 
NATO and the 
Warsaw Pact, respectively. While they engaged in 
proxy wars
 and developed powerful nuclear arsenals, the two countries avoided 
direct military conflict. Resisting leftist land and income 
redistribution projects around the world, the United States often 
supported authoritarian governments. American troops fought Communist 
Chinese forces in the 
Korean War of 1950–53. The 
House Un-American Activities Committee pursued a series of investigations into suspected leftist subversion, while Senator 
Joseph McCarthy became the figurehead of anticommunist sentiment.
The 1961 Soviet launch of the 
first manned spaceflight prompted President 
John F. Kennedy's call for the United States to be first to land 
"a man on the moon", achieved in 1969. Kennedy also faced a 
tense nuclear showdown with Soviet forces in Cuba. Meanwhile, the United States experienced sustained economic expansion. A growing 
civil rights movement, symbolized and led by African Americans such as 
Rosa Parks and 
Martin Luther King, Jr., used 
nonviolence to confront segregation and discrimination. Following 
Kennedy's assassination in 1963, the 
Civil Rights Act of 1964 and 
Voting Rights Act of 1965 were passed under President 
Lyndon B. Johnson.
[50][51] He also signed into law the 
Medicare and 
Medicaid programs.
[52] Johnson and his successor, 
Richard Nixon, expanded a proxy war in Southeast Asia into the unsuccessful 
Vietnam War. A widespread 
countercultural movement grew, fueled by 
opposition to the war, 
black nationalism, and the 
sexual revolution. 
Betty Friedan, 
Gloria Steinem, and others led a 
new wave of feminism that sought political, social, and economic equality for women.
As a result of the 
Watergate scandal, in 1974 Nixon became the first U.S. president to resign, to avoid being 
impeached on charges including obstruction of justice and abuse of power. The 
Jimmy Carter administration of the late 1970s was marked by 
stagflation and the 
Iran hostage crisis. The election of 
Ronald Reagan as president in 1980 heralded a 
rightward shift in American politics, reflected in major changes in 
taxation and spending priorities. His second term in office brought both the 
Iran-Contra scandal and significant 
diplomatic progress with the Soviet Union. The subsequent Soviet collapse ended the Cold War.
 Contemporary era
Under President 
George H. W. Bush, the United States took a lead role in the UN–sanctioned 
Gulf War. The longest economic expansion in modern U.S. history—from March 1991 to March 2001—encompassed the 
Bill Clinton administration and the 
dot-com bubble.
[53] A 
civil lawsuit and 
sex scandal led to 
Clinton's impeachment in 1998, but he remained in office. The 
2000 presidential election, one of the closest in American history, was resolved by a 
U.S. Supreme Court decision—
George W. Bush, son of George H. W. Bush, became president.
On 
September 11, 2001, 
al-Qaeda terrorists struck the 
World Trade Center in New York City and 
The Pentagon near Washington, D.C., killing nearly three thousand people. In response, the 
Bush administration launched the global 
War on Terror, 
invading Afghanistan and removing the 
Taliban government and al-Qaeda training camps. 
Taliban insurgents continue to fight a guerrilla war. In 2002, the Bush administration began to press for regime change in Iraq on 
controversial grounds.
[54] Forces led by the U.S. invaded Iraq in 2003, ousting 
Saddam Hussein. In 2005, 
Hurricane Katrina caused severe destruction along much of the 
Gulf Coast, devastating 
New Orleans. In 2008, amid a global 
economic recession, the first African American president, 
Barack Obama, was elected. Major 
health care and 
financial system reforms were enacted two years later. In 2011, a raid by 
Navy SEALs in 
Pakistan killed al-Qaeda leader 
Osama bin Laden. The 
Iraq War ended with the pullout of the remaining U.S. troops from the country.
Tuesday, June 12, 2012
 
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