Question

Why was the city of Berlin vulnerable to Soviet influence?

because the Allies had promised it to the Soviets after World War II

because it was located within the Soviet zone of Germany

because the Soviets had lost their own capital city in the war

Answer 1

Because it lay deep inside the Soviet occupation zone of Germany. Although Berlin itself was divided into four Allied sectors, the city was surrounded by Soviet-controlled territory, which allowed the USSR to exert pressure (e.g., the 1948–49 Berlin Blockade) and influence access to the city.