3rd Battalion, 9th Marines

3rd Battalion, 9th Marines
3/9 Insignia
Active	20 November 1917 – 12 August 1994 21 May 2008 – August 2013
Country	United States of America
Branch	United States Marine Corps
Type	Infantry Battalion
Role	Locate, close with and destroy the enemy with fire and maneuver, and repel the enemy's assault with fire and close combat
Part of	Deactivated
Garrison/HQ	Camp Lejeune
Nickname(s)	Shadow Warriors
Motto(s)	"Death in the Dark" (Vietnam Era), "Striking 3/9" (Post-Vietnam Era)
Engagements	World War II Battle of Bougainville Battle of Guam Battle of Iwo Jima Vietnam War Operation Desert Storm Operation Restore Hope War on Terror Operation Iraqi Freedom Operation Enduring Freedom
Commanders
Current commander	None

The 3rd Battalion, 9th Marines (3/9) is an infantry battalion of the United States Marine Corps. Formed during World War I it served until the early 1990s when it was redesignated as 3rd Battalion, 4th Marines (3/4) during a realignment and renumbering of the Marine Corps' infantry battalions, following the deactivation of the 9th Marine Regiment. The 3rd Battalion, 9th Marines was initially a subordinate unit of the 9th Marine Regiment, 3rd Marine Division, but was later operationally transferred to the 1st Marine Division as a subordinate unit of the 7th Marine Regiment where it remained until its redesignation as 3/4.

3/9 was reactivated under the 2nd Marine Division in May 2008 as the Marines expanded as a result of the continuing War on Terror.