The 115th Field Artillery Brigade, known as “Cowboy Thunder” is an artillery formation of the United States Army, raised by the Wyoming Army National Guard.

Its history stretches back to the 1800s when Wyoming was a U.S. territory.

It was redesignated as the 115th Field Artillery Brigade September 1, 1978.

Consolidated 18 December 1967 with Company C, 102d Engineer Battalion (organized and Federally recognized 25 September 1956 at Cheyenne), and consolidated unit designated as Headquarters and Headquarters Battery, 115th Artillery Group.

[2] The regiment had a long history, dating back to units formed in the Wyoming Territory.