Louisiana was purchased from France and was bought to access the Mississippi River. The Mexican Cession occurred in 1848 and was acquired because of the Treaty of Guadalupe Hidalgo after the American victory of the Mexican-American War. Oregon was acquired in 1846 and was acquired from Britain. Texas annexed itself from Mexico in 1845 and became it's own country for several of years, before joining the U.S.
On which one? or on both of them?
In 1969 protesters for American Indian independence occupied the island "Alcatraz" of the coast of San Fransisco. They did this mainly to bring attention to the unfair treatment of Natives by the US government.
