In 1920, he joined the
U.S. Foreign Service and was sent to the
American Embassy in Paris as
Third Secretary. In 1925, the year that
Benito Mussolini asserted his right to supreme power and became dictator of Italy, he was posted to the
Rome embassy where he remained for the next eleven years, thus becoming one of the State Department's leading experts on Fascist Italy. There he met Eleanor Barclay, from
San Antonio, Texas. They were married in 1928. Their first son, Harold III was born in 1929, and their second son, Barclay, was born in 1932. A concerted effort was made many times by Taylor to persuade the Pope to try to influence Mussolini to remain neutral in the war. The Pope sent many messages to Mussolini during the first half of 1940, as did Taylor, but on June 10, 1940, after the defeat of the
British Expeditionary Force (BEF), Italy declared war on
England. After that happened, it became clear that the mission had failed. The European ambassadors to Italy moved out of the embassies into
Vatican City as diplomatic relations with Italy were cut. After
Pearl Harbor and the US. entry into the war in 1941, Tittmann was reassigned to Rome, and he also moved into the Vatican where he became the
Charge d'Affaires and the chief source of information to President Roosevelt of the happenings inside
Fascist Italy. After Taylor returned to the United States, Tittmann remained inside Vatican City until the
liberation of Rome in 1944. At that time he and his family moved back to Rome where he remained until 1946. == Post-war career ==