The President of the United States of America takes pride in presenting the Silver Star (Posthumously) to Master Sergeant Mac Rockwell Corwin (MCSN: 378827), United States Marine Corps, for conspicuous gallantry and intrepidity while serving with the First Tank Battalion, FIRST Marine Division (Reinforced), in action against enemy aggressor forces in Korea on 29 November 1950. Although suffering from painful enemy shrapnel wounds sustained earlier in the day, Master Sergeant Corwin bravely continued to perform his duties as truckmaster in a convoy carrying friendly troops from Koto-ri to Hagaru-ri and, despite hostile fire, boldly moved among the vehicles shouting words of encouragement to the drivers. Mortally wounded by the enemy while driving the leading vehicle through a hostile road-block, Master Sergeant Corwin, by his inspiring leadership, marked courage and steadfast devotion to duty, greatly aided in maintaining the security of the convoy and upheld the highest traditions of the United States Naval Service. He gallantly gave his life for his country.