Answer:
most likely one of the northern ones but I can't tell you specifically
Answer -
The Truman Doctrine was basically a shot at the Soviet Communism and how it wasn't right, so this obviously angered the Soviets. The Doctrine caused a divide between the communists and non-communists, which did indeed grow tension between America and the Soviet Union which eventually would lead to the Cold War.
I believe this would be Upper paleolithic because the creation of the tools and using them would quickly help them to establish the Neolithic era creating tools out of metal rather than stone.
