Civilization in each region developed advance math,science, and engineering.
He contracted with the king of Gahanna MANSA YOU SAY , he gave him militia etc.
In 1942, Great Britain was at the head of the British Empire, the largest Empire in known history.
At it's peak, the empire consisted of nearly 25% of the world's population, a large landmass, unmatched resources and hundreds of millions of subjects.
If the axis were able to control Great Britain, they would quite possibly have complete hegemony over the world.