Complex sentence: Colonel Jake Caffey (David Soul), U.S. Army, a combat veteran of the Vietnam War, is sent to locate one of the groups of soldiers, who have already been ambushed and killed by the Soviet assault force.
Split into simpler sentences: Colonel Jake Caffey (David Soul), U.S. Army, a combat veteran of the Vietnam War, is sent to locate a missing group of soldiers. The missing soldiers have been ambushed and killed by the Soviet assault force.