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.
Yaqui Wars
The Yaqui Wars, were a series of armed conflicts between New Spain, and the later Mexican Republic, against the Yaqui Indians. The period began in 1533 and lasted until 1929. The Yaqui Wars, along with the Caste War against the Maya, were the last conflicts of the centuries long Mexican Indian Wars. Over the course of nearly 400 years, the Spanish and the Mexicans repeatedly launched military campaigns into Yaqui territory which resulted in several serious battles and some infamous massacres.