After the United States annexed the territories after winning the Mexican–American War, it engaged in the Yuma War from 1850 to 1853 in response to a conflict between the Quechan and Jaeger's Ferry and the Glanton Gang, after the Quechan had established a rival ferry service on the Colorado River. During which, the historic Fort Yuma was built across the Colorado River from the present day Yuma, Arizona.
After the United States annexed the territories after winning the Mexican–American War, it engaged in the Yuma War from 1850 to 1853 in response to a conflict between the Quechan and Jaeger's Ferry and the Glanton Gang, after the Quechan had established a rival ferry service on the Colorado River. During which, the historic Fort Yuma was built across the Colorado River from the present day Yuma, Arizona.