USA HISTORY

Detailed explanation-1: -The most consequential territorial expansion in the country’s history occurred during the 1820s.

Detailed explanation-2: -A significant push toward the west coast of North America began in the 1810s. It was intensified by the belief in manifest destiny, federally issued Indian removal acts, and economic promise. Pioneers traveled to Oregon and California using a network of trails leading west.

Detailed explanation-3: -The lands acquired stretched from the Mississippi River to the Rocky Mountains and from the Gulf of Mexico to the Canadian border. Jefferson later owned that he had “stretched the Constitution until it cracked” to acquire Louisiana.

Detailed explanation-4: -Thousands of people crossed the Rockies to the Oregon Territory, which belonged to Great Britain, and thousands more moved into the Mexican territories of California, New Mexico and Texas.

Detailed explanation-5: -During this crucial period, the United States pursued a policy of expansion based on “manifest destiny, ” the ideology that Americans were in fact destined to extend their nation across the continent.