Complex sentence: As a first lieutenant, he was presented the Nation's highest decoration for valor by President Harry S. Truman in a White House ceremony on 1 August 1951 for his actions on 20 September 1950 near Yongdungpo, Korea, on the outskirts of Seoul.
Split into simpler sentences: As a first lieutenant, he was presented the Nation's highest decoration for valor by President Harry S. Truman in a White House ceremony on 1 August 1951. The action occurred on 20 September 1950 near Yongdungpo, Korea, on the outskirts of Seoul.