The Battle of Willow Beach took place some time after the First Battle of Hoover Dam between the New California Republic and the Caesar's Legion. It marked the return to NCR-Legion hostilities and was the first Legion strike since the First Battle of Hoover Dam. The fighting was led by Legion forces in a bid to push the NCR out of the east side of the Colorado River.
The battle took place at Camp Willow, east of the Colorado River, where an NCR military camp was located. As a result of the battle, the camp was destroyed. The battle, along with the Battle of Arizona Spillway, led NCR forces to be pushed off the east side of the river and gave the Legion complete control on the eastern side of the Colorado River.