9th Marine Regiment

9th Marine Regiment
9th Marines insignia
Active	1917–1919; 1943–1945; 1947–1949; 1952–1994; 2007–2015
Country	United States of America
Branch	United States Marine Corps
Type	Infantry
Part of	3rd Marine Division III Marine Expeditionary Force
Nickname(s)	"Striking Ninth"
Engagements	World War II Battle of Bougainville Battle of Guam Battle of Iwo Jima Vietnam War Operation Dewey Canyon Operation Desert Storm
Commanders
Notable commanders	Lemuel C. Shepherd Gordon D. Gayle Robert H. Barrow Stephen G. Olmstead

The 9th Marine Regiment was an infantry regiment of the United States Marine Corps. Formed during World War II, it served until 1994, when it was deactivated during the post Cold War drawdown. Battalions of the Ninth Marine Regiment, but not the regiment itself, were reactivated from 2007 to 2014 as part of the Marine Corps' growth during the wars in Iraq and Afghanistan. The battalions have subsequently been deactivated again.