Four thumbs up and I have only two!
The best of the four movies is They Were Expendable, about the beginning of the PT boats in the Pacific theatre. (Yes this is the type of boat John F. Kennedy captained.) The lead star is Robert Montgomery, whose daughter incidentally was Elizabeth, star of the old Bewitched series. His acting is a lot better than John Wayne's and he was a Navy veteran during the war. Back to Battan is also good with Anthony Quinn playing a Philpino resistance leader. I note that all four movies are thre-star.