After graduating high school in Kansas City, Missouri, Louis Tiernan attended Saint Mary’s College in Saint Mary’s, Kansas. He graduated from Saint Louis University in 1906, and in 1910 he studied at the North American College in Rome, Italy. On May 21, 1910, he was ordained a Roman Catholic Priest at Saint John Basilica in Rome. From 1917 to 1919 he served as a U.S. Army Chaplain with the 129th Field Artillery, where he became a close, lifetime friend of Major Harry S Truman. He re-entered military service in 1929, and during World War II as a Colonel, he was the Chief Chaplain in the European Theater, earning the Army Distinguished Service Medal. In 1945, he was a personal guest of President Harry Truman at the Potsdam Conference, and retied as a U. S. Army colonel in 1948.




