Answer:
You can use the First Indochina War.
Explanation: The Vietnamese became victims of the French taking over their land and pushing non-communist ideas onto them. The Vietnamese were brought into the Cold War because of this and there were rising tensions because of Communist and anti-communist ideas.
It would be the "Western Ghats" that prevents moisture from the summer monsoon winds from reaching the interior of the subcontinent, since its positioning is such that any excess winds are diverted.