Riddle No 2: Dictators

I fought in 3 continents. I ruled on a land which I wasn't born in. Although I was a dictator, I brought the message of liberty to the land I conquered. Who am I?

The answer to riddle No 1 - Gandhi -

Gandhi's first name is "mohandes" which is the Arabic word for engineer. He got decorated for organizing ambulance units during the Boer war. He begun his political carrier in South Africa, and then returned to India and there he fought the British.