Which of these events occurred during the Ghana Empire? Timbuktu was developed into a center of learning.
Islam was introduced into the West African region.
Moroccan invaders conquered the empire.
A large amount of technology was developed.

Britain and its empire stood alone against hitler and mussolini. in june 1941, hitler broke the non-aggression agreement with stalin and germany invaded the soviet union. in december, japan attacked the us and britain. the main lines of world war ii had formed.