In which movie did Chris Klein play U.S. Army officer 2nd Lieutenant Jack Geoghegan?

The film "We Were Soldiers" is a Vietnam War epic that tells the true story of the 1965 Battle of Ia Drang through the eyes of Lieutenant Colonel Hal Moore (Mel Gibson). Moore led 500 American soldiers into battle against thousands of well armed Vietnamese troops. The battle was one that lasted for three days and resulted with Lt. Geoghegan and 149 other Americans being killed. About 834 North Vietnamese soldiers were confirmed killed; another 1,000 communist casualties were assumed.

John Lance "Jack" Geoghegan was born in November 1941; he died in November 1965. He was an infantry 2nd lieutenant in the U.S. Army. Jack Geoghegan was portrayed by Chris Klein in the 2002 film "We Were Soldiers".

Geoghegan was killed in battle in 1965 while attempting to reach one of his fellow soldiers who had been wounded, Willie Godboldt. For his acts of bravery, Lieutenant Geoghegan was posthumously awarded the Silver Star, Bronze Star, Purple Heart, and the Air Medal.