Complex sentence: The idea of US Army formations consisting on suspect solders was created by a War Department order of 3 October 1942 to be comprised of soldiers from all over the United States suspected, but not proved of disloyalty or subversive tendencies.
Split into simpler sentences: The idea of US Army formations consisting on suspect solders was created by a War Department order of 3 October 1942. The units were to be comprised of soldiers from all over the United States suspected, but not proved of disloyalty or subversive tendencies.