World War II

3rd Battalion, 9th Marine Regiment was reactivated on 12 February 1942, at Camp Elliot, San Diego, California as part of the 2nd Marine Division. The battalion was formed by a nucleus of officers and Marines from the 2nd Marine Regiment. In September 1942, the battalion was relocated to Marine Corps Base Camp Pendleton and reassigned to the 3rd Marine Division. The battalion was initially deployed to Cape Paerata, New Zealand in February 1943 and then moved to Guadalcanal in July of that year.

3/9 participated in the following campaigns during World War Two: Bougainville, Northern Solomons, Guam, and Iwo Jima. At Iwo Jima, 3/9 had the distinction of making the only battalion size unsupported, non-illuminated night attack against the Japanese in the Pacific War. Attesting to the ferocity of combat on Iwo Jima, all 22 of the battalion's officers who landed on D-Day were killed or wounded by the end of the battle.^[1] For their service at Iwo Jima, the battalion received the Presidential Unit Citation. The battalion was disbanded on 31 October 1945.

Laotian crisis of 1962

On 19 May 1962 the Battalion Landing Team 3/9 Marines began flying in to Udorn Royal Thai Air Force Base from Bangkok as part of a buildup of US forces in Thailand in response to the worsening situation of the Royal Lao Government in the Laotian Civil War. The Marines were then moved north to the town of Nong Khai where they conducted field training exercises with the Royal Thai Army and civic action with Thai civilians. On 1 July, with the situation in Laos stabilizing, the Marines were flown from Udorn to the Philippines and then on to Okinawa.^[2]

Vietnam War

3/9 became the first battalion-sized ground combat unit to be deployed to Vietnam when they landed on 8 March 1965 in Da Nang, Republic of Vietnam. Over the course of the next four and a half years, the battalion operated from Da Nang, An Hoa and Quảng Trị and participated in over 40 combat operations, including Operation Double Eagle, Operation Buffalo and Operation Dewey Canyon. The battalion redeployed on 13 August 1969, after four years of continuous combat operations.^[3]

Kilo and India companies were deployed to Bien Hoa Air Base to provide ground support, for Marine Aircraft Group 12 (MAG-12) in May 1972. They remained at Bien Hoa until January 1973.^[4]

Kilo Co.3/9 was deployed to Bien Hoa Vietnam from Okinawa on 22 May 1972, India Co. 3/9 relieved Kilo Co. on 26 August 1972 and remained at Bien Hoa until 3 Feb 1973. The last U.S. Marine killed in action before the war ended at 08:00 on 28 January 1973 (local) was PFC Mark Miller who was killed on 26 January 1973, listed as a member of MGAG-12, he was in fact a member of India Company 3/9 on temporary assignment to MAG-12.^[5]

3/9 was the Battalion on Float at the time of Operation Frequent Wind, on Mount Fuji, Japan doing cold weather training went the call came. They had to be flown back to Okinawa and loaded onto USS Denver and were involved with the evacuation of the VIP's and refugees until the very end.

The 1980s and 1990s

During 1986 though 1987 3/9 was commanded by LtCol James L Jones who later became the Commandant of the Marine Corps, NATO Commander, and the National Security Adviser. During 1986 the battalion participated in the filming of Heartbreak Ridge in Camp Pendleton, California and Hamburger Hill while deployed to the Philippines. From March 1990 to April 1990 3/9 was deployed to Honduras, to train the Honduras Military to fight against Rebels from Nicaragua and El Salvador. During this time they were detached to the CIA who had a Base close to that border region. They were sent on patrols and participated when fired upon and they would defuse land mines placed around friendly villages who supported the Honduron Military. Participated in Operation Desert Shield between August 1990 and January 1991. Participated in Operation Desert Storm between January 1991 and March 1991. There they participated in the Battle of Kuwait International Airport. Participated in Operation Restore Hope between 1992 and 1993. Deactivated on 2 September 1994 and redesignated 3rd Battalion 4th Marines.

2000s

On 7 December 2006, Headquarters Marine Corps released a message stating that 3rd Battalion, 9th Marines would be reactivated during 2008 as part of the continuing Global War on Terror.^[6]

On 20 May 2008, 3/9 was reactivated at Marine Corps Base Camp Lejeune, North Carolina under the 2nd Marine Division.^[7][8]

In July 2009, 3rd Battalion 9th Marines deployed to Iraq in support of Operation Iraqi Freedom. They came home within 3 months due to troop withdrawals in Iraq.

In December 2010, 3rd Battalion 9th Marines deployed to Afghanistan in support of Operation Enduring Freedom. On 23 April 2011, while conducting combat operations in Helmand province, Afghanistan, LCPL Dominic Ciaramitaro and SGT Sean Callahan were killed in action.

The Marines and Sailors of 3/9 were successful in breaking through and pushing back enemy lines, ultimately removing the Taliban from power and handing over the area of operations to the Afghan National Army (ANA). The Marines and Sailors of 3rd battalion, 9th Marine Regiment returned to the United States in early July 2011.

In October 2012, 3rd Battalion 9th Marines deployed to Marjah, Helmand, Afghanistan in support of Operation Enduring Freedom.