USS America (LHA-6) off Rio de Janeiro in August 2014


  United States
Marine Medium Tiltrotor Squadron 164
HMMT-164 Green.JPG

           Old HMMT-164 unit insignia
Active July 1, 1962–present
Country United States
Branch United States Marine Corps
Type Medium-lift Tiltrotor Squadron
Role Assault support
Part of Marine Aircraft Group 39
3rd Marine Aircraft Wing
Garrison/HQ Marine Corps Air Station Camp Pendleton
Nickname(s) “Knightriders”
“Flying Death” (Vietnam)
Tail Code YT
Engagements Vietnam War
*Operation Eagle Pull
*Operation Frequent Wind
Operation Desert Storm
Operation Restore Hope
Commanding Officer LtCol. Eric M. Aschenbrenner
Executive Officer Maj. Jason T. Barnes
Sergeant Major SgtMaj. Irving M Green.
Aircraft flown
Cargo helicopter CH-46 Sea Knight (1965-2015)
MV-22B Osprey (2015-Present)


Marine Medium Tiltrotor Squadron 164 (VMM-164), is a United States Marine Corps tiltrotor squadron operating the MV-22B Osprey. Known as the Knightriders, they fall under the command Marine Aircraft Group 39 (MAG-39) and the 3rd Marine Aircraft Wing (3rd MAW). They are based at Marine Corps Air Station Camp Pendleton.

With the advent of the Unit Deployment Program, on September 1, 1978, HMM-164 returned home to MCAS Santa Ana, California. In September 1978, the squadron rejoined Marine Aircraft Group 36 (MAG-36) at MCAS(H) Futenma for a six-month tour beginning in August 1979 and returning to MCAS(H) Tustin in February 1980. On November 1, 1980, HMM-164 became the first unit on the West Coast to receive the “E” model CH-46. By March 1981, the squadron had received its full complement of “Echo” helicopters. During the summer of 1989, the squadron simultaneously supported oil spill cleanup efforts in Valdez, Alaska and an Air Contingency Force at Soto Cano Air Base, Honduras.

In June 1990, HMM-164 deployed to the Western Pacific with the 13th Marine Expeditionary Unit (13th MEU) and provided support relief efforts following the July earthquake that devastated the Philippines. In August 1990 the squadron proceeded to Southwest Asia and participated in maritime interdiction operations during Operation Desert Shield and then provided combat support during Operation Desert Storm before returning to MCAS Tustin in April 1991.

The squadron deployed in October 1992 with the 15th Marine Expeditionary Unit (15th MEU). The squadron provided support to Joint Task Force (Somalia) during Operation Restore Hope from December 1992 until February 1993. HMM-164 returned to MCAS Tustin in April 1993. August 1993 found the squadron providing support for units training at the Mountain Warfare Training Center, Bridgeport, California and provided a mission capabilities demonstration for the Secretary of the Navy. In August 1993, the Marine Corps Aviation Association chose HMM-164 as the Medium Helicopter Squadron of the year.

A CH-46 Sea Knight from HMM-164 during a training exercise in California in 1986.

In June 1995, HMM-164 deployed as the Aviation Combat Element with the 11th Marine Expeditionary Unit (11th MEU). During this time it provided support for the United States Central Command in Operation Vigilant Sentinel in Kuwait as well as Bahrain, Qatar, and United Arab Emirates before returning and relocating to MCAS El Toro, California in December 1995.

In February 1996, HMM-164 was called upon to support the President of the United States as he visited the flood-ravaged areas around Portland, Oregon.

On August 28, 1997, HMM-164 (REIN) deployed again with the 13th Marine Expeditionary Unit. During the month of December 1997 and January 1998, the squadron’s AV-8B Harrier IIs and KC-130 Hercules flew combat sorties in support of Operation Southern Watch over southern Iraq. HMM-164 (REIN) returned to MCAS El Toro on February 26, 1998, completing its final deployment before re-designation as a Fleet Replacement Squadron.

On January 8, 1999, HMM-164 relocated to MCAS Camp Pendleton, California as part of the Base Realignment and Closure (BRAC) move and was attached to MAG-39 effective January 11. In February 1999, the Squadron was re-designated HMMT-164 and was tasked to become the Marine Corps’ Fleet Replacement Squadron for the CH-46E.

During March 1999, the squadron deployed two aircraft to Moffett Federal Airfield to support Operation Urban Warrior and accept its first two student pilots. In May, the Marine Enlisted Aircrew Training Department accepted its first class of new enlisted aircrew. On June 1, 1999, the squadron took over the role as Model Manager and Fleet Project Team Manager for the CH-46E. Since 2000, HMMT-164 has trained over 360 new pilots and 460 crew chiefs.

On June 28, 2008, HMMT-164 deployed to Naval Air Station Lemoore after California Governor Arnold Schwarzenegger requested military assistance to fight raging wildfires. The helicopters are providing medium lift rotary wing support to United States Northern Command and the National Fire Center.[6]

On April 9, 2015, HMMT-164 officially retired the CH-46E and transitioned to the MV-22B Osprey. As part of the transition, they became a fleet squadron rather than a training squadron and so were redesignated as VMM-164.



















*(Courtesy Wikipedia)



















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