3rd Battalion 1st Marines (3/1) is an infantry battalion in the United States Marine Corps based out of Camp Horno on Marine Corps Base Camp Pendleton, California. Nicknamed the "Thundering Third", the battalion consists of approximately 1220 Marines and Sailors and falls under the command of the 1st Marine Regiment and the 1st Marine Division.
Read more about 3rd Battalion 1st Marines: Subordinate Units, Medal of Honor Recipients From 3/1, Unit Awards