Thus the Industrial Revolution stirred ambitions in many European countries and renewed their confidence to embark on a path of aggressive expansion overseas. From the late 1800s through the early 1900s, Western Europe pursued a policy of imperialism that became known as New Imperialism.
Explanation:
The European nations were able to conquer large sections of Africa in those times because they had more advanced military technology. Europeans easily adapted to African climate and topography. But Also, Europe, has more advances in technology in warfare, transportations. Also their governments are strong and stable due to ones careful rule.
But the real reason for European dominant is because they really and I mean really focus on their militaristic aspect as which they relied on for stability, conquest, and glory because thousands of years, Kings and some Queens are tought the ways of war and how war can give more than just territory and as a matter of fact Kings had trained themselves in Europe for milania, so not just did Kings evolve but the technology to fight among themselves were drastically improved as well.
This is all the information I have sadly.
Two
The cities were Hiroshima and Nagasaki. On August 6, 1945, a bomb was dropped on Hiroshima that instantly killed around 80,000 people, and many thousands more from after-effects of the nuclear explosion. On August 9, 1945, a second atomic bomb was dropped on Nagasaki, with an immediate death toll of around 40,000.