Battleground is a 1949 American war film that follows a company in the 327th Glider Infantry Regiment, 101st Airborne Division as they cope with the Siege of Bastogne during the Battle of the Bulge in World War II. It stars Van Johnson, John Hodiak, Ricardo Montalban and George Murphy, and features James Whitmore. It was directed by William Wellman from a script by Robert Pirosh. Wikipedia
Hansan: This is an M-1, semi-automatic, high velocity... Soldier: Look, you're not selling it to me, you're showing me how to fire it.