enacted during the Civil War in 1862 gave any adult citizen or intended citizen who had never borne arms against the U.S. government could claim 160 acres of surveyed government land.
was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million.
The Mexican Cession is the region in the modern-day southwestern United States that Mexico ceded to the U.S.
In 1846 the Oregon Treaty was signed between the US and Britain to settle the boundary dispute. The British gained the land north of the 49th parallel, including the Vancouver Island and the United States received the territory south of the parallel.