Check the listing for details. US 20th SPECIAL OPERATION SQUADRON " PONY EXPRESS " VIETNAM WAR PATCH. Condition: Used. Listed at 10.99 USD. The size of this patch is 3" x 3.2".In 1965, the 20th SOS's CH-3C helicopters were transferred to Southeast Asia and the squadron began participating in unconventional warfare and special operations in Laos and North Vietnam as the Pony Express. In 1967, the 20th was joined by the UH-1F/P helicopters formerly assigned to Project Lucky Tiger and the Hueys became known as the Green Hornets. This squadron supported Special Operations in South Vietnam and Cambodia. In August 1969 the Pony Express CH-3E's were transferred to the 21st Special Operations Squadron at Nakhon Phanom Royal Thai Air Force Base and the Pony Express ceased to exist. The heritage of the 20th was carried on by the 20th UH-1's Green Hornets. The Green Hornets continued to perform unconventional warfare missions for seven years, until inactivation in 1972.COMBINED SHIPMENT OF MULTIPLE ITEMS IS REDUCED TO SAVE YOU MONEY.YOUR ITEM WILL BE SHIPPED WITHIN 24 HOURS UPON RECEIPT OF YOUR PAYMENT.FOR INTERNATIONAL BUYERS ONLY: WE WILL SHIP BY 1st CLASS MAIL. WE REQUIRE BUYERS TO WAIT FOR THE INVOICE BEFORE PAYING.OUR FEEDBACK IS IMPORTANT TO US AND WE WANT YOU TO BE HAPPY WITH YOUR PURCHASE. IF YOU FIND SOMETHING WRONG, PLEASE CONTACT US BEFORE LEAVING A NEUTRAL OR NEGATIVE FEEDBACK AND WE WILL TRY TO MAKE IT RIGHT. THANKS FOR YOUR PURCHASE. ENJOY !