Yuma Crossing
Immediately after the Mexican–American War in 1848, the U.S. Army built Fort Yuma here to protect travelers from Indians raiding the area. It was the center point of conflict in the Yuma War of 1850–53. From 1864–1890, the fort and nearby facilities was the main army base to support the US Army's efforts to control the Indians throughout the greater southwest.
San Timoteo Canyon
In November 1851, the Garra Revolt occurred, a conflict of the Yuma War. The Cupeño leader Antonio Garra attempted to bring Juan Antonio and the Mountain Cahuilla band into the Serrano, Cahuilla and Cupeño Indians independence revolt. Juan Antonio, a new ally of the Americans, captured Antonio Garra, and turned him over to American officials ending the Garra Revolt.