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.
Yama–Ichi War
The Yama–Ichi Feud (山一抗争, "Yama-Ichi Kōsō") was a yakuza conflict mainly fought in the Kansai region of Japan from 1985 to 1989, between the Yamaguchi-gumi and the Ichiwa-kai gangs.