Battle for Saipan (2022) is an R-rated war action thriller directed by Brandon Slagle that follows a U.S. Army surgeon, played by Casper Van Dien, leading a last stand during the 1944 Pacific invasion. While critics generally characterized it as a low-budget B-movie, some praised the indie film for its action sequences. For more details, visit IMDb . Battle for Saipan | Rotten Tomatoes