U.S. Soldiers tour French Assault Ship Tonnerre during Alligator Dagger U.S. Marines assigned to the 15th Marine Expeditionary Unit board a French landing catamaran en route to the French navy amphibious assault ship LHD Tonnerre during Exercise Alligator Dagger at Arta Beach, Djibouti, Dec. 18, 2017. Alligator Dagger, led by Naval Amphibious Force, Task Force 51/5th Marine Expeditionary Brigade, is a dedicated, bilateral combat rehearsal that combines U.S. and French forces to practice integrated capabilities available to U.S. Central Command, both afloat and ashore. Marine Corps photo by Sgt. Jessica Y. Lucio SHARE IMAGE: Download Image: Full Size (2.01 MB) Photo By: Staff Sgt. Vitaliy Rusavskiy VIRIN: 171218-M-QL632-012.JPG Photo Gallery