They could've promised them land and they traded expensive goods with the British.
In 1948, the United States responded to the
Soviet blockade of West Berlin by organizing an airlift of supplies to West Berlin.
The Vietnam war was in favour of the Northern revolutionary forces. Just after the war, a peace treaty was signed which allows a government to be initiated in the Southern Vietnam, to find out that it has become a puppet government of the North, therefore, Vietnam remained to be a communist state.