Marines with Alpha Company, 1st Battalion, 5th Marine Regiment provide security on the beach following an amphibious landing as part of Exercise Dawn Blitz 2015 at Marine Corps Base Camp Pendleton, Calif., Sept. 5, 2015. Dawn Blitz is a multinational, amphibious training exercise designed to hone the amphibious landing skills of I Marine Expeditionary Brigade, Expeditionary Strike Group Three and allies of the United States. - Marines with Alpha Company, 1st Battalion, 5th Marine Regiment provide security on the beach following an amphibious landing as part of Exercise Dawn Blitz 2015 at Marine Corps Base Camp Pendleton, Calif., Sept. 5, 2015. Dawn Blitz is a multinational, amphibious training exercise designed to hone the amphibious landing skills of I Marine Expeditionary Brigade, Expeditionary Strike Group Three and allies of the United States.