F Troop (TV series 1965-1967)

Becoming a hero by accidentally leading a cavalry charge the wrong way, Captain Wilton Parmenter is given command of Fort Courage. The Fort's crafty Sgt. O'Rourke has a deal with the local Hekawi Indians to market their wares to the tourists. They must sometimes pretend to be enemies (and the Shugs really are enemies). Jane is out to marry the innocent Parmenter. - IMDb