President Truman's relief of General Douglas MacArthur creation of a professional military. This made civilian control increasingly problematic when coupled with the constitutional division of powers between the President as commander-in-chief, and the Congress with its power to raise armies, maintain a navy, and wage wars. In relieving MacArthur for failing to "respect the authority of the President" by privately communicating with Congress, Truman upheld the President's role as pre-eminent. Harry S. Truman became President of the United States on the death of Franklin D. Roosevelt in 1945, and won an unexpected victory in the 1948 presidential election. He was the only president who served after 1897
President Truman's relief of General Douglas MacArthur as Operation Rugged, and pressed MacArthur for permission to launch it. On 15 March 1951, the day after Seoul had been recaptured a second time, Truman had responded to a reporter's question about whether UN forces would again be allowed to move north of the 38th Parallel by saying that it would be "a tactical matter for the field commander". MacArthur thereupon gave Ridgway permission to launch his attack, setting an objective line north of the 38th Parallel that would secure Seoul's water supply. He did so without consulting with Washington until after the attack began on 5 April 1951.