On 10 July 1943, a combined force of American and British Commonwealth troops invaded Sicily. German generals again took the lead in the defence and, although they lost the island after weeks of bitter fighting, they succeeded in ferrying large numbers of German and Italian forces safely off Sicily to the Italian mainland. On 19 July, an Allied air raid on Rome destroyed both military and collateral civilian structures. With these two events, popular support for the war diminished in Italy.