One Man's Hero tells the little-known story of the "St. Patrick's Battalion" or "San Patricios," a group of mostly Irish and other immigrants of the Catholic faith who deserted to Mexico after encountering religious and ethnic prejudice in the U.S. Army during the Mexican-American War. The plot centers around the personal story of John Riley, an Irishman who had been a sergeant in the American Army who is commissioned as a captain in the Mexican army and commands the battalion, as he leads his men in battle and struggles with authorities on both sides of the border
Tom Berenger
as Captain John Riley
Joaquim de Almeida
as Cortina
Daniela Romo
as Marta
Mark Moses
as Col. Benton Lacy
Stuart Graham
as Corporal Kenneally
Gregg Fitzgerald
as Paddy Noonan
Don Wycherley
as Brian Athlone
Wolf Muser
as Cpl. Schultz
Luke Hayden
as Seamus McDougherty
Ilia Volok
as Daniel Grzbalski
Patrick Bergin
as General Winfield Scott
James Gammon
as General Zachary Taylor
