OKINAWA, Japan (March 17, 2021) U.S. Marines with 3rd Battalion, 3rd Marines conduct experimentation in littoral defense operations during Castaway 21.1 around Okinawa, Japan, March 18, 2021. Castaway 21.1 demonstrated the Marine Corps� ability to integrate with the joint force to seize and defend key maritime terrain, provide low-signature sustainment, and execute long-range precision fires in support of naval operations from an expeditionary advanced base. 3/3 is part of 3rd Marine Division, forward-deployed in the Indo-Pacific. (U.S Marine Corps photo by Lance Cpl. Joshua Brittenham)