The Defiant Agents: A Science Fiction, Post-1930 Classic By Andre Norton! AAA+++

Alien technology scavenged by U.S. and Russian scientists has started a race to colonize planets outside our solar system -- and the U.S. scientists are losing! In a desperate move the U.S. government decides to use a group of Apache volunteers in an experimental attempt to colonize a primitive planet, but before they can even begin their spaceship crashes on the planet Topaz...