Personnel from the British Army's Yorkshire Regiment carry out extreme winter training in snowy Estonia!
Chinook Gunship in Vietnam
A couple of Vietnam War era Staff film reports about a special armed gunship version of the CH47 Chinook. Designated ACH47A by the US Army and nicknamed "Guns a go go" by its crews, 3 Chinook Gunships were tested in the Vietnam War. https://en.wikipedia.org/wiki/Boeing_CH-47_Chinook#ACH-47A