Check the listing for details. VIETNAM WAR PATCH, US 158th ASSAULT HELICOPTER BN CHALLENGE LIGHTNING 41. Condition: Used. Listed at 10.98 USD. THIS ITEM MEASURES 3.75 IN X 3 IN.With the arrival of larger American and allied units beginning in 1965, many Assault Helicopter Companies were assigned to Vietnam as organic elements of infantry, air cavalry and airmobile divisions. These organic units took essentially the same form as the original Assault Helicopter Companies except they were sometimes organized as complete battalions rather than self-contained, independent companies. These divisional Assault Helicopter Battalions (AHB’s) were usually comprised of 3 slick companies and 1 gunship company. Unlike independent AHC’s, each company was made up entirely of either slicks or gunships. A representative example of this type of battalion was the 158th Assault Helicopter Battalion of the 101st Airborne/Airmobile Division. For orders of multiple items, please ask (or wait) for a revised invoice with reduced shipping charge BEFORE paying.Due to global pandemic and USPS reduction of services, mail delivery is slowing down. Please allow extra time. 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 DO APPRECIATE YOUR BUSINESS. THANKS.