Marines, assigned to the 15th Marine Expeditionary Unit, approach targets during a live-fire exercise aboard the amphibious transport dock ship USS Green Bay (LPD 20). Green Bay is part of the Peleliu Amphibious Ready Group, underway on a deployment with the amphibious assault ship USS Peleliu (LHA 5) and the amphibious dock landing ship USS Rushmore (LSD 47). The U.S. Navy is constantly deployed to preserve peace, protect commerce, and deter aggression through forward presence. Join the conversation on social media using #warfighting. (U.S. Navy photo by Mass Communication Specialist 1st Class Elizabeth Merriam/Released)