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.
Pennamite–Yankee War
The Pennamite–Yankee Wars or Yankee–Pennamite Wars were a series of conflicts consisting of the First Pennamite War (1769–1770), the Second Pennamite War (1774), and the Third Pennamite War (1784), in which the Wyoming Valley along the North Branch of the Susquehanna River was disputed between settlers from Connecticut (Yankees) and Pennsylvania (Pennamites).