The Battle of Britain was the first major campaign to be fought entirely by air forces, and was also the largest and most sustained aerial bombing campaign to that date. The Battle of Britain marked the first defeat of Hitler's military forces.
Western Han Dynasty.
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The Minoan culture of crete developed a commercial empire around 2000-1500 B.C.
Weakened by subsequent and frequent attacks, and cut-off from international trade of salt, gold, and other important things, the kingdom was vulnerable and unable to prevent defeat. In 1240 C.E., Ghana was conquered and absorbed/added into the growing nation of Mali, which would soon become the next great empire.
After Mansa Musa died, his son Maghan took the throne. Maghan was a weak ruler. Raiders from the southeast poured into Mali. Mali neverfully recovered from the attack. The Malian Empire continued to weaken and decline after.This soon lead to the uprise of the new empire Songhai,which would be the new and powerful empire after Mali had fallen.