What is the significance of the invasion of Italy?italians surrender to Allies, september 1943

I believe the question relates to invasion of Italy by
Allied forces during World War II.

Axis planes based at
Sicily bombed Allied ships in the Mediterranean, Therefore they wanted to capture Sicily
to make the Mediterranean safe for their ships and to possibly force Italy out of the
war. With this objective Allied forces landed along Sicily's south coast on July 10,
1943.  They engaged in bitter fighting with German troops over rugged terrain for 39
days forcing last Germans to leave Sicily on August 17,
1943.

In the meantime fell from power on July 25, 1943.
Perhaps fall of Sicily contributed substantially to his fall.  Finally Italy surrendered
on September 3, 1943.

However, Germany was determined to
fight the Allies for control of Italy. To counter the Germans, Allied forces landed at
Salerno, Italy, on Sept. 9, 1943.  this was preceded by another Allied force landing
farther south. The German Positions in Italy were well defended and Allies forces had to
struggle in a series of head-on assaults on them. Thus progress of allied forces was
slow, but by early November, they nearly reached Cassino, about 120 kilometres south of
Rome.

In January 1944, the Allies landed troops at Anzio,
west of Cassino, to attempt an attack from behind.  However, it took them four months
and sacrifice of thousands of Allied soldiers to break through German defences. Finally
Rome fell on June 4. Still the Germans held their positions in northern Italy for a long
period, and it was only in May 2, 1945, that German forces in Italy finally
surrendered.

The main impact of all these evens on war was
to secure Mediterranean sea secure for allied forces, and engaging part of Axis forces
in defense of Italy. In a way fall of Mussolini also prevented Italy from collaborating
with Germany. surrender of Italy to allied forces was a blow to the German
morale.