I watched “Kelly’s Heroes” (1970) for the first time last weekend. Turns out the film was made in Yugoslavia (Croatia today) because the Yugoslav army still used WWII-era Sherman tanks, which were part of the plot so could be cheaply accessed.

(There were also some tax or funding reasons I believe.)

(Side note - holds up well for a 50 year old movie; and one of the best Donald Sutherland performances, in the same year he did MASH.)