"Kelly's Heros" and "Two Mules for Sister Sara" were released one week apart in June 1970. My (then) future wife and I went to see them then and still have to watch them every time they come on TV.
I liked Oddball, during the battle when his tank was broke. He was laid back in the sunshine as I recall and said, Hey man, I just drive 'em; I don't fix 'em"