Question: The film To Hell and Back stars a combat solider that received the Medal of Honor at what age?
Context: Matt Louis Urban (August 25, 1919 – March 4, 1995) was a United States Army lieutenant colonel who was one of the most decorated American infantry officers of World War II.  He performed valiantly in combat on many occasions despite being wounded in action several times.  Urban received over a dozen personal decorations for combat from the U.S. Army, including seven Purple Hearts.  In 1980, he received the Medal of Honor and four other personal decorations for combat belatedly for his actions in France and Belgium in 1944. John Lewis Barkley (August 28, 1895 - April 14, 1966) was a United States Army Medal of Honor recipient of World War I.  Born and raised in Kansas City, Missouri, Barkley served as a Private First Class in Company K, 4th Infantry Regiment, 3rd Division.  He earned the medal while fighting near Cunel, France, on October 7, 1918.  His autobiography, "Scarlet Fields: The Combat Memoir of a World War I Medal of Honor Hero," details his service leading up to and following his Medal of Honor action.  The book draws comparisons as the American literary response to "All Quiet on the Western Front."  Barkley died in 1966, and is buried in Forest Hill Cemetery, Kansas City, Missouri. The Medal of Honor is the United States of America's highest and most prestigious personal military decoration that may be awarded to recognize U.S. military service members who distinguished themselves by acts of valor.  The medal is normally awarded by the President of the United States in the name of the U.S. Congress.  There are three versions of the medal, one for the Army, one for the Navy, and one for the Air Force.  Personnel of the Marine Corps and Coast Guard receive the Navy version.  U.S. awards, including the Medal of Honor, do not have post-nominal titles, and while there is no official abbreviation, the most common abbreviations are "MOH" and "MH".  The Medal of Honor is the oldest continuously issued combat decoration of the United States armed forces. Audie Murphy (20 June 1925 – 28 May 1971) was a highly decorated American soldier and Medal of Honor recipient who turned actor.  He portrayed himself in the film ""To Hell and Back"", the account of his World War II experiences.  During the 1950s and 1960s he was cast primarily in westerns.  While often the hero, he proved his ability to portray a cold-blooded hired gun in "No Name on the Bullet".  A notable exception to the westerns was "The Quiet American" in which he co-starred with Michael Redgrave.  Murphy made over 40 feature films and often worked with directors more than once.  Jesse Hibbs who directed "To Hell and Back" worked with the star on six films, only half of which were westerns.  When promoting his 1949 book "To Hell and Back" he appeared on the radio version of "This Is Your Life".  To promote the 1955 film of the same name, he appeared on Ed Sullivan's "Toast of the Town".  He was a celebrity guest on television shows such as "What's My Line? " and appeared in a handful of television dramas.  Murphy's only television series "Whispering Smith" had a brief run in 1961.  For his cooperation in appearing in the United States Army's "Broken Bridge" episode of "The Big Picture" television series he was awarded the Outstanding Civilian Service Medal. Audie Murphy (1925–1971) was born into a poor family in Texas and became a highly decorated American soldier who served with the United States Army in nine campaigns in Europe from 1942 to 1945.  He was the recipient of the Medal of Honor for his combat heroism in World War II and received every American combat award for valor available from the Army at the time of his service.  At the onset of the Korean War, he was commissioned as an officer in the Texas National Guard and served with the Guard for sixteen years before retiring from military service.  His home state posthumously awarded him the Texas Legislative Medal of Honor for his combined service in the Army and the Guard. Audie Murphy (20 June 1925 – 28 May 1971) was one of the most decorated United States Army combat soldiers of World War II, serving from 1942 to 1945.  He received every American combat award for valor available at the time of his service, including the Medal of Honor.  He also received recognitions from France and Belgium.  With his 1945 military discharge at the end of the war, Murphy became an advocate of treatment for post-traumatic stress disorder in veterans.  The Audie L. Murphy Memorial VA Hospital in San Antonio and the Sergeant Audie Murphy Clubs (SAMC) on military bases honor his contributions.  He joined the Texas National Guard in 1950, transferring to reserve status in 1956 and remaining in the Guard until 1969.  He also had a civilian career as a film actor and songwriter.  Recognitions he received both during his lifetime and posthumously are listed below. To Hell and Back is a Technicolor and CinemaScope war film released in 1955.  It was directed by Jesse Hibbs and starred Audie Murphy as himself.  It is based on the 1949 autobiography of the same name and is an account of Murphy's World War II experiences as a soldier in the U.S. Army.  The book was ghostwritten by his friend, David "Spec" McClure, who served in the Army's Signal Corps during World War II. Wesley Gibbs (July 24, 1842 - May 29, 1917) was an American soldier who fought in the American Civil War.  Gibbs received his country's highest award for bravery during combat, the Medal of Honor.  Gibbs's medal was won for his capturing the flag during the Third Battle of Petersburg on April 2, 1865.  He was honored with the award on May 10, 1865.  Following his Medal of Honor his rank was subsequently reduced to Private, for reasons unknown. John Walker a/k/a Joseph Frazier, was a private with Company D, 8th U.S. Cavalry of the United States Army, who received the Medal of Honor for "gallantry in action" in combat with Apache Indians during the Apache Wars, at Red Creek, Arizona in the Arizona Territory (a few miles north of the present-day Lake Pleasant Regional Park) on September, 23, 1869.  18 Indians were reportedly killed, with more wounded.  The Medal of Honor was issued on November 23, 1869.  However, John Walker had an alias of "Joseph Frazier."  He reportedly deserted twice, with the final desertion in 1874.  John Walker was reportedly born in 1845 in Leon, Landes forest, Aquitaine, France, while "Joseph Frazier" was reportedly born in Italy.  Sergeant Charles Harris and Corporal George Ferrari also received the Medal of Honor for bravery in that battle. Audie Leon Murphy (20 June 1925 – 28 May 1971) was one of the most decorated American combat soldiers of World War II, receiving every military combat award for valor available from the U.S. Army, as well as French and Belgian awards for heroism.  Murphy received the Medal of Honor for valor demonstrated at the age of 19 for single-handedly holding off an entire company of German soldiers for an hour at the Colmar Pocket in France in January 1945, then leading a successful counterattack while wounded and out of ammunition.
Answer: 19