A bombing raid of USAAF planes against Frascati, a historical town near Rome, Italy, was made on 8 September 1943. The target was the German General Headquarters for the Mediterranean zone (O.B.S.) and the Italian headquarters, scattered in buildings and villas nearby the town.
General Doolittle's operation order of 7 September 1943 was: Intentions for September eight heavies will destroy town of Frascati - This target is important and must be destroyed.
The aircraft headed for Littoria (modern Latina) and Monte Cavo (Alban Hills), they arrived on Frascati at 12:10. Their target was Field Marshal Albert Kesselring and his staff.
The anti-aircraft defence was equipped with heavy anti-aircraft guns of 88/56 mm and machineguns of 37/20 mm, which they had placed on Tuscolo ridge and terraces in the town reinforced with cement pillars to stand the recoils.
The Italian Royal Air Force (Regia Aeronautica) engaged about 30 aircraft fighters, some obsolete biplane Fiat CR.42s, some Macchi C.200s, Fiat G.50s, Reggiane Re.2001s, Macchi C.202s and two Fiat G.55s. This was the last mission of Regia Aeronautica before the Armistice with the allied. Overall, one Allied aircraft was destroyed, a B-17 of 97th Bomber Group and 36 fighter attacking were destroyed in air.
About 50% of the buildings, many of the monuments and villas were destroyed. St. Pietro square was destroyed, however, the Cathedral facade remained undamaged.
In that day United States General Dwight D. Eisenhower publicly announces the Allied armistice with Italy.