Danger in the Pacific (1942)

"American Eagles blow up the Nazi ammunition dumps on hidden tropical isle!"

Scientist-explorer David Lynd leaves wealthy bride-to-be June Claymore at the altar to join photographer Andy Parker and British secret service agent Leo Marzeli in search of rare minerals. They soon run afoul of crooked trader Tagani, who's been busily stockpiling weapons in the hills on behalf of his Nazi partners.