Under the heavy bombardment of numerous warships of the Royal Fleet, the British Army took less than a week to conquer Sicily and the city of Messina, which is across the sea from the Italian mainland, and took the opportunity to head south and successively occupy Catania and Syracuse.
As a result, only the capital Palermo remained unconquered on Sicily, and it was only a matter of time.
If you had a map, you could see that by now, nearly half of Italy's territory had been occupied, and the remaining land was precisely the least important southern region.
The southern region did indeed have a substantial agricultural scale, but how could Italy carry out agricultural production under the relentless bombing and surveillance of the British-French-Australian Air Force?
With continued strikes, the defense of Rome also seemed precarious.