Final answer:
The Salo Republic was destined to be short-lived due to the capture and execution of Mussolini, the Allied invasion of Italy, and significant opposition from within Italy.
Step-by-step explanation:
The Salo Republic, also known as the Italian Social Republic, was destined to be short-lived due to several factors. One major reason was the capture and execution of Mussolini by Italian communist partisans in April 1945. Without Mussolini, who was considered the figurehead of the Republic, the government lost its legitimacy and support.
Furthermore, the Allied invasion of Italy in September 1943 weakened the Republic's position. The Italian government, led by Marshal Pietro Badoglio, initiated secret negotiations with the Allies and eventually surrendered. This led to German troops invading and setting up a government, which further undermined the Salo Republic's control.
In addition, the Salo Republic faced significant opposition from various factions within Italy, including former fascist supporters, military officers, and liberal politicians. The Grand Fascist Council voted to remove Mussolini from power and place him under arrest, highlighting the lack of support for the Republic within the country.