Yuma War
The Yuma War was the name given to a series of United States military operations conducted in southern California and what is today southwestern Arizona from 1850 to 1853. The Yumans were the primary opponent of the United States Army, though engagements were fought between the Americans and other native groups in the region. Conflict generally took the form of guerrilla warfare, and, over the course of three years, the army engaged in pursuing unfriendly natives, protecting American settlers crossing the Colorado River and preventing conflict between the native tribes. A peace treaty in summer of 1853 was signed, ending hostilities between the Yuma and the United States, but it sparked a short war between the Yuma and the Cocopah. During the conflict, the historic Fort Yuma was constructed and became an important outpost on the frontier.
Yuma War
When conflict with the Cocopah ceased the Americans at Fort Yuma received a new objective which was to prevent further bloodshed between the American tribes. Chief Irataba went to Fort Yuma where he asked the Americans to deliver a sort of contract to the four other Mohave war chiefs. The four braves were Kapetame, Asikahota, Tapaikuneche and Hatsurama, and with Irataba they were known as the "Five Brave Men". All ranked equally and all received five letters from the American army, which, if accepted, they would no longer attack other Americans tribes or American settlers and they would not prevent the army from building forts and roads on their land. If the stipulations were not met the United States would go to war against the Mohave. With some convincing from Aratave, the four other chiefs eventually agreed to be peaceful and the Yuma War came to an end.