Expeditionary Strike Group 3 is an expeditionary strike group (ESG) of the U.S. Navy. Expeditionary strike groups combine the capabilities of surface action groups, submarines, and maritime patrol aircraft with those of Amphibious Ready Groups for deployment and maintaining staff proficiencies to provide fleet commanders with a highly flexible, ready fly-away unit. It is capable of projecting expeditionary striking power in the maritime, littoral, and inland environs in support of U.S. national interests.