Warfighting

U.S. Marine Corps Sgt. Daniel Jones, a mortarman with 2nd Battalion, 23rd Marines forward deployed with 4th Marine Regiment, 3d Marine Division as part of the Unit Deployment Program, writes coordinates down during Korea Viper 25.4 at Camp Rodriguez, South Korea, May 23, 2025. Korea Viper is a recurring exercise series that demonstrates the Republic of Korea and U.S. Marine Corps' ability to respond decisively in the region as a singular, unified force while strengthening relationships and trust between the two allies. Jones is a native of Missouri. (U.S. Marine Corps photo by Lance Cpl. Tucker Mocan)