The Civil Affairs section that Hargrove is assigned to is an actual military function. The purpose of civil affairs is to work with the civilian government, or where civilian government is absent, to act in place of it, in countries where the U. S. military operates. The goal is to help restore civilian order, rule of law, and effective government operation, all while reducing resistance to the military presence.
This film was initially telecast in Los Angeles Tuesday 11 March 1958 on KTTV (Channel 11), followed by Philadelphia Wednesday 26 March 1958 on WFIL (Channel 6), by San Francisco Sunday 6 April 1958 on KGO (Channel 7), and, finally, by New York City 15 December 1958 on WCBS (Channel 2).
The trivia item below may give away important plot points.
When Corporal Hargrove is assigned as a Forward Observer, they relay the coordinates and location of German troops to the artillery Fire Direction Center, which then computes the data into fire commands to the gun (artillery) batteries. The reason the Fire Direction commands are not exactly verbatim the forward observer information relayed is because they are in two different locations. The forward observers may be looking at the target to the north, but the battery is firing at the target to the northwest (or any similar variation).