Mark Wayne Clark (May 1, 1896 – April 17, 1984) was a United States Army officer who saw service during World War I, World War II, and the Korean War. He was the youngest four-star general in the US Army during World War II. On March 10, 1945, at the age of 48, Clark became one of the youngest American officers promoted to the rank of four-star general. Dwight D. Eisenhower, a close friend, considered Clark to be a brilliant staff officer and trainer of men.