Warn European nations that the United States would not tolerate further colonizatio
The Japanese justified their imperialism in multiple different ways, depending on what territory is in question.
For China, there was a fake attack on Japanese property, performed by the Japanese themselves, so they invaded Manchuria with the justification that their citizens were in danger.
Korea and Taiwan were justified in the sense that some countries had colonies which they used for resources and as market for their products, so the Japanese justified it in the manner that they also deserve to have such territories.
For some territories they conquered there was no real justification though, and the Japanese didn't really bothered with making excuses anymore.
Both Sargon and Hammurabi were leaders of the Mesopotamia. According to legend, the mother of Sargon abandoned him in a basket in a river; as a man he worked in Kish, a Sumerian city-state, which he took over and later created an empire which he ruled for over fifty years. Similarly to Sargon´s accomplishments, Hammurabi also took over an important city, Larsa; he later took the whole of Mesopotamia; he is best known for his creation of a Law Code.
The ruler who promoted religious diversity in the Ottoman Empire was
Akbar. Akbar encouraged people from all backgrounds and faiths to be
part of his rule, encouraging everyone to join his army and therefore
built a strong force in the process. Although he himself was Muslim, he
married a Hindu princess.