Dastardly and Muttley in Their Flying Machines (1969)

Set in World War I, Dick Dastardly, his dog Muttley, and the rest of the Vulture Squadron are bent on capturing Yankee Doodle Pigeon to prevent him from delivering his messages to the enemies. Aboard their many crazy aircraft, Dastardly and Muttley devise nefarious plans to stop the pigeon. Their motivation is the possibility of earning a medal or maybe even a 30 day furlough. The only problem is, that crafty pigeon always seems to be one step ahead.