Goofy contortion of Stephenson's Leiningen Versus the Ants, well goofy in its own right. The short story is pre-war German, the film post-war American--both concerned with an unempathetic and ambiguous communism (ANTS). More useful as a historical document re. popular social consciousness in the mid-century west than as cinema.
Typically of Haskin, it's pretty entertaining, but there's a jarring contrast between a weird mail-order-bride set-up justifying sexism with Parker and Heston's characters, and then an army-ant prompted change of heart is streaked with a very racist white-man telling the natives what to do. In fact, Heston forces his workers to act like whites and stand their ground against something they know is unbeatable.