Kelly’s Heros was great.
RIP
from the imdb trivia page for Kelly’s Heroes 1970:
During filming in Yugoslavia in 1969, Donald Sutherland (Oddball) received word, via co-star Clint Eastwood (Private Kelly), that his then-wife Shirley Douglas was arrested: she had tried to buy—using a personal check—hand grenades from an undercover FBI agent for the Black Panthers. Sutherland recounts this story often, mentioning that when Eastwood got to the part about the personal check, he laughed so hard that he fell to his knees and Sutherland had to help him up. Eastwood then put his arm around Sutherland, walked him down the hill that overlooked the Yugoslavian countryside, and assured his friend of his complete support with his predicament.