(1961) Cal Truent is a soldier in Earth's interplanetary military service, when he is involved in a combat encounter that leaves him wounded and with no memory of what happened. Discharged from military service, he joins the Contact Service, charged with building peaceful relations with former enemies. It's an interesting response to Starship Troopers, but an over-earnest, unengaging one -- too bad, because I'm sympathetic to the message.