Woven cloth badge : Knightriders HMM-164, United States Marine Corps

Circular woven cloth badge in subdued green and black. The badge features a red-eyed warrior in silhouette, wearing a horned helmet and holding a battle-axe. He also holds a shield on which are the letters, 'Y T'. In a scroll at the top of the patch is embroidered, 'KNIGHTRIDERS'. In a scroll at the bottom of the patch is embroidered, 'HMM-164'.

Badge collected by Chief Petty Officer Signals Yeoman (CPOSY) Duncan John Perryman, RAN during his service in HMAS Tobruk as part of UN operations in Somalia. UNOSOM II (United Nations Operation in Somalia) was the second phase of the United Nations intervention in Somalia. It ran from March 1993 until March 1995. UNOSOM II carried on from the US-controlled (but UN sanctioned) UNITAF, which had in turn taken over from the ineffectual UNOSOM I mission. All three of these interventions were aimed at creating a secure enough environment for humanitarian operations to be carried out in the increasingly lawless and famine-struck country. The RAN played an important part in the UNOSOM deployment, transporting the battalion group equipment, vehicles, and some troops, to Somalia on board the training ship HMAS Jervis Bay and the heavy landing ship HMAS Tobruk. Tobruk subsequently remained in the area in support, providing logistic support to the Australians and UNITAF, and conducted surveillance off the Somali coast. Its helicopter was used in ship-to-shore transport of personnel. Tobruk was also used by the land forces for rest and recreation. Marine Medium Helicopter Squadron 164 (HMM-164) was activated in 1964. This squadron was deployed in October 1992 with the 15th MEU (Marine Expeditionary Unit). Operating CH-46 Sea Knight helicopters, the squadron provided support to Joint Task Force (Somalia) during Operation Restore Hope from December 1992 until February 1993. HMM-164 returned to MCAS (Marine Corps Air Station) Tustin, California in April 1993. The letters 'YT' on the badge stand for 'Yankee Tango', the squadron code for HMM-164.