1950 science fiction movie on an island base


Okay Hive Mind: I’m trying to identify a (I think SF) movie that had the following elements:
black and white
takes place on an island Army/Navy base
there’s a dog
there’s a doofus Private who loves the dog and then gets murdered
there’s a hero planning to leave real soon
Based on a (minor) novel

Any ideas?

Stonebroke Answered question Nov 3, 2021

Can we rule out The Proud and Profane (1956)?

And Five on a Treasure Island (1957)?