The 5th Marine Regiment is an infantry regiment of the United States Marine Corps based at Marine Corps Base Camp Pendleton, California. It is the most highly .\rbr\rbrThe 5th Marine Regiment is an infantry regiment of the United States Marine Corps based at Marine Corps Base Camp Pendleton, California. It is the most highly .\rbr\rbrThe 5th Marine Regiment in Afghanistan documentary Army Documentary 2015 The 5th Marine Regiment in Afghanistan documentary Army Documentary 2015 .\rbr\rbrThe 5th Marine Regiment in Afghanistan documentary The 5th Marine Regiment in Afghanistan documentary The 5th Marine Regiment in Afghanistan . The 5th .