-
-
The Senate ratified a treaty with France, promoted by President Thomas Jefferson, that doubled the size of the United States -
The Lewis and Clark Expedition was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase -
The War of 1812 was a conflict fought by the United States of America and its indigenous allies against Great Britain and its allies in British North America. -
James Monroe was an American statesman, lawyer, diplomat and Founding Father who served as the 5th president of the United States from 1817 to 1825. -
The Baltimore & Ohio Railroad became the first U.S. railway chartered for commercial transport of passengers and freight. -
Congress passed the Indian Removal Act, beginning the forced relocation of thousands of Native Americans in what became known as the Trail of Tears. -
Conflict between the United States and Mexico, stemmed from the annexation of the Republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River (the Mexican claim) or the Rio Grande (the U.S. claim). -
A gold rush that began when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. The news of gold brought approximately 300,000 people to California from the rest of the United States and abroad. -
The American Civil War was a civil war in the United States fought between the Union and the Confederacy. The central cause of the war was the status of slavery, especially the expansion of slavery into territories acquired -
Abraham Lincoln became the United States’ 16th President in 1861, issuing the Emancipation Proclamation that declared forever free those slaves within the Confederacy in 1863. -
President Abraham Lincoln issued the Emancipation Proclamation that declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free." -
Standard time in time zones was instituted in the U.S. and Canada by the railroads. -
The Statue of Liberty was a joint effort between France and the United States, intended to commemorate the lasting friendship between the peoples of the two nations -
The Spanish–American War was an armed conflict between Spain and the United States. Hostilities began in the aftermath of the internal explosion of USS Maine in Havana Harbor in Cuba, leading to U.S. intervention in the Cuban War of Independence.