U.S. Marines with 1st Battalion, 1st Marine Regiment, 1st Marine Division, participate in an amphibious landing and assault through a combat town on Red Beach during Steel Knight 20 at Marine Corps Base Camp Pendleton, California, Dec. 6, 2019. Steel Knight is an annual exercise that spans the western United States and California coast. It focuses on ground fires, maneuver warfare tactics and command and control capabilities, in order to test Marines and sailors across a range of environments and preparing to counter aggression against a near-peer threat. (U.S. Marine Corps photo by Lance Cpl. Angela Wilcox)