Oh no, The westerners are trying to gang up on the Soviet Union because they hate communism
Entry to Berlin: Forbidden
Hey Mr. Gorbachev
The grand alliance(and France) agreed to divide Germany, and its capital, Berlin, into four separate zones administered by the USSR USA UK and France. The division was meant to be temporary but ended up lasting for many years. There were soldiers on the streets and in Berlin, checkpoints to cross from one side to another
In 1947 the US and UK agreed to ~connect~ their land as they were already working together, they called this land 'Bizonia', then in May 1948 France joined, thus making the land 'Trizonia'. They created a currency (deutschmark) for Trizonia without consulting Stalin, this made him feel this was an act of 'ganging up' on the soviets and communism.
Stalin Appears the Villain
Stalin knew, as Berlin was in Soviet territory, that the western zones were vulnerable, in addition there were only two agreed land routes and two air routes across soviet Germany into western Berlin. In June 1948, Stalin shut off the land routes into Berlin (Berlin Blockade). He wanted to show the western countries that a divided Germany would not work. the main section of trizonia in western germany couold no longer communicate with trizonian berlin and the people of Berlin would run short of food.
Trizonia has to find a way to get supplies to Berlin, President Truman decided to take a risk and fly supplies into Berlin. Stalin had no choice but to not shoot them down as he would inevitably start a war with the US if he was to shoot them down.
On 9th May 1949, nearly a year later, the soviets gave in and lifted the blockade. The airlift had worked. Amazingly, there were no allied casualties, military or civilian. West Berlin had survived. Stalin's attempt to win a propaganda victory over Britain, France and the USA.
Overall, Stalin's actions increased the likelihood of a real war breaking out. Although no war came from this as the US found a way around it. A different president or prime minister could have acted differently and acted upon these high tensions.