Answer: The Burmese Communist Party said that it was part of "an imperialist plot", claiming that Aung San had been in discussions with them to form a "united front" government, and that the assassination had been carried out to prevent this.
1. gulf of tonkin incident
2. truman doctrine
3.containment of communism
probably a little off but it'll lead you in the right direction.
(I was literally learning this a couple months ago and my memory is a little rusty)
