Battle Beneath the Earth (1967)
A Chinese general goes berserk and has a system of tunnels dug all the way from China to USA, under the Pacific Ocean. The man who has discovered this is locked up because they think he is insane. US Navy soldiers go underground to repel the invaders.
Britt Ekland in The Night They Raided Minsky's (1968)  A naive young Amish woman…
Yvonne Craig posing in a sexy little bikini withJack Mullaney