The 5th was expanded and reflagged to become C-509th in 1975 and subsequently the company adopted the same flash and wing oval worn by 1-509th in Vicenza, Italy. On 18 February 1977 the 1st Aviation Brigade, which had served as a combat unit in Vietnam, was reactivated as a training unit at Fort Rucker, resulting in C-509th being assigned to the brigade. As a unit of the 1st Aviation Brigade, C-509th adopted the brigade shoulder sleeve insignia and worn it beneath a blue and white Airborne tab.