Greyhawks established January 15, 1961
1951 - Marine Helicopter Transport Squadron 161 (HMR-161)
1956 - Marine Helicopter Transport Squadron (Light) 161
1962 - Marine Medium Helicopter Squadron 161 (HMM-161)
On 2009 with the transition to the MV-22 Osprey became VMM-161
1951 - Marine Helicopter Transport Squadron 161 (HMR-161)
1956 - Marine Helicopter Transport Squadron (Light) 161
1962 - Marine Medium Helicopter Squadron 161 (HMM-161)
On 2009 with the transition to the MV-22 Osprey became VMM-161
This unit was located at MCAS Santa Ana/Tustin until moving to MCAS El Toro in 1995 not 1997. They were the first unit to transition to El Toro from Tustin after their 94/95 west pac deployment aboard the USS Essex (LHD2)
Locations
| 1951-1955 | KNZJ NZJ | MCAS El Toro |
| 1951 | KNTK NTK | MCAS Santa Ana / Tustin |
| 1955-1966 | PHNG | MCAS Kaneohe Bay |
| 1966 | ROTM |  MCAS Futenma |
| 1966-1968 | KNCA | MCAS New River |
| 1970-1995 | KNTK NTK | MCAS Santa Ana / Tustin |
| 1995-1999 | KNZJ NZJ | MCAS El Toro |
| 1999-2009 | KNKX NKX | MCAS Miramar |
Models
| 1951-1960 | S-55 H-19 |
| 1960-1966 | S-58 H-34 |
| 1966-2009 | CH-46 Sea Knight |