Castaway 21.1 Littoral Defense

 U.S. Marines with 3d Battalion, 3d Marines conduct experimentation in littoral defense operations during Castaway 21.1 around Okinawa, Japan, March 16-17, 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 3d Marine Division, forward-deployed in the Indo-Pacific.