Marine Formation Navy Lt. Col. Brian Greene addresses a formation of Marines on the flight deck of the amphibious assault ship USS Bonhomme Richard in the Philippine Sea, Sept. 27, 2016. The Marines are assigned to 2nd Battalion, 4th Marine Regiment, 31st Marine Expeditionary Unit. The ship is supporting security and stability in the Indo-Asia-Pacific region. Navy photo by Petty Officer 2nd Class Sarah Villegas SHARE: Download: Full Size (1.2 MB) Credit: Petty Officer 2nd Class Sarah Villegas VIRIN: 160927-N-YG104-010.JPG Photo Gallery