U.S. Marines with the 3rd Assault Amphibian Battalion, 1st Marine Division, depart the USS Rushmore to conduct an amphibious assault on Red Beach, Camp Pendleton, California, during Exercise Dawn Blitz, Oct. 27, 2017. DB17 is a scenario-driven amphibious exercise conducted between Expeditionary Strike Group 3 and 1st Marine Expeditionary Brigade, testing their ability to conduct amphibious operations in response to global crises and to project power ashore as part of a Navy-Marine Corps team. - U.S. Marines with the 3rd Assault Amphibian Battalion, 1st Marine Division, depart the USS Rushmore to conduct an amphibious assault on Red Beach, Camp Pendleton, California, during Exercise Dawn Blitz, Oct. 27, 2017. DB17 is a scenario-driven amphibious exercise conducted between Expeditionary Strike Group 3 and 1st Marine Expeditionary Brigade, testing their ability to conduct amphibious operations in response to global crises and to project power ashore as part of a Navy-Marine Corps team.