|Nazi railroad yards at Siena are knocked out. On the alternate line from Pisa and Florence south to Rome, the Siena yards were blasted by Mediterranean Allied Air Force Bombers. Within two months "Operation Strangle" had smashed all large and medium sized railyards at Rome, Rimini, Ancona, Pisa, Arezzo, Foligno, Terni, and Viterbo.|
Operation Strangle was a series of air operations during the Italian Campaign of World War II by the United States Fifteenth and Twelfth Air Forces to interdict German supply routes in Italy north of Rome from March 24, 1943, until the fall of Rome in spring 1944. Its aim was to prevent essential supplies from reaching German forces in central Italy and compel a German withdrawal. The strategic goal of the air assault was to eliminate or greatly reduce the need for a ground assault on the region. Although the initial goal of forcing the enemy to withdraw was not achieved, the air interdiction of Operation Strangle played a major role in the success of the subsequent ground assault Operation Diadem.