3rd Battalion, 9th Marines

3rd Battalion, 9th Marines
3/9 Insignia
Active20 November 1917 – 12 August 1994
21 May 2008 – August 2013
Country United States of America
Branch United States Marine Corps
TypeInfantry Battalion
RoleLocate, close with and destroy the enemy with fire and maneuver, and repel the enemy's assault with fire and close combat
Part ofDeactivated
Garrison/HQCamp Lejeune
Nickname(s)Shadow Warriors
Motto(s)"Death in the Dark" (Vietnam Era), "Striking 3/9" (Post-Vietnam Era)
EngagementsWorld War II

Vietnam War
Operation Desert Storm
Operation Restore Hope
War on Terror

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.