Answer:
Joseph Stalin's faith was Christian growing up, but as an adult, he began to take on Marxism and communism as his main belief systems. At one point, Stalin claimed to be an atheist and studied the works of Charles Darwin. Other authors that shaped his belief system were Engels and Lenin.
B. geographical boundaries created in earlier historical periods
The "separate but equal" doctrine
The main reason why the Ho Chi Minh Trail was important to the North Vietnamese and the NLF was because it provided for vital supply lines for the Viet Cong during the war.