Two of the oddest features of World War II combined for an issue, when the Creature Commandos ended up on Dinosaur Island, fighting the War That Time Forgot in Weird War Tales #100 (June, 1981) by Mike W. Barr, Bob Hall and Jerry Ordway (under a cover by Joe Kubert).
The War That Time ForgotSuicide Squad, which came first, but this version started in Star Spangled War Stories #110) and the Bird-Man (who fought enemy forces on pterodactyls, starting in Star Spangled War Stories #129), with the series ending in Star Spangled War Stories #137 (February-March, 1968), though Dinosaur Island could still be found, being visited once by the crew of the Haunted Tank, then a few stories in Weird War Tales before the team-up (and a few after)...
...with Dinosaur Island "settling" post-Crisis to be a part of Warlord's Skartaris (and even being a place where Bat Lash and the Enemy Ace fought Vandal Savage in the 1920s before these stories....).
But, back to the task at hand....
There, they encountered Japanese troops (as well as plenty of dinosaurs), with both Shrieve and the Japanese commander realizing that the dinosaurs could have uses as troops as well.
The Creature Commandos reluctantly fought the dinosaurs, dispatched the Japanese troops, and even helped rally the dinosaurs to take out the Japanese convoy, with Shrieve taking pictures to document how the dinosaurs could be used by the government against the Japanese.
Lucky (the patchwork man) destroyed Shrieve's camera, with Velcro (the vampire) explaining that he wouldn't let them exploit the dinosaurs, who were just mindless creatures, unlike the "monsters" of the Creature Commandos they already have in service.