After assignments in the War Department (1929-35), he accompanied General Douglas MacArthur to the Philippines as an assistant military advisor; his principal duty was helping MacArthur and his staff develop a viable Filipino Army.
Following the Japanese bombing of Pearl Harbor on December 7, 1941, Eisenhower was again called to the War Department where Army Chief of Staff General George Marshall placed him in charge of plans for the Pacific War. Two months later, Marshall promoted him to chief of the War Plans Division where he received his second general's star. In June 1942, Marshall sent him to England on a special mission to build cooperation among the Allies as Commanding General, U.S. Army, European Theater. Eisenhower arrived in England on June 24, 1942, and except for a brief stateside visit in January 1944, he was separated from his family until June 1945, following the end of the war in Europe.
Chief of Staff
General Eisenhower served as Chief of Staff of the United States Army from November 1945 until February 1948. He resigned from the Army on February 7, 1948 to serve as president of Columbia University. In 1950, at President Truman's request Eisenhower took a leave of absence from Columbia to command the North Atlantic Treaty Organization. As Supreme Allied Commander, Europe, during the following two years he would stay in touch with Columbia and especially with the American Assembly, a university innovation to which he had devoted substantial energy and time. On June 1, 1952 Eisenhower returned to the United States to campaign actively for the presidency.