For decades I believed that “Expendable” was actually filmed in the Philippines at war’s end. I looked it up on imdb.com and read that it was actually filmed in the Florida Keys. The lack of mountains should’ve tipped me off. In the early 60s, I spent 18 months stationed in the Philippines.
I try to figure out where things are filmed, too, but know that the earlier the film is, the less chance it was made on location...it was just too hard in those days.
“Expendable” is one of my favorite Duke movies because he really did ACT in it...his face when he hears that Donna Reed is on Corregidor is heart-wrenching...
Other Duke faves are Red River, Stage Coach, Horse Soldiers, Quiet Man and Searchers....thank goodness for the oldies!