Welcome to the website for 2nd Battalion, 5th Marines -- the most decorated Battalion in the Marine Corps. On behalf of all the Marines, Sailors, and their families, it's a privilege to have you aboard. We are located at Camp San Mateo aboard Marine Corps Base Camp Pendleton in San Diego County, and are part of the I Marine Expeditionary Force, 1st Marine Division, 5th Marine Regiment. At times, particularly during deployment periods, several other attachment commands and units call 2/5 home.