Indian campaign of Alexander the Great

The Indian campaign of Alexander the Great began in 326 BC. Alexander was born September 20, 356 B.C. in Pella, in the Kingdom of Macedonia. During his leadership, he united the Greek city-states and led the Corinthian League. He also became the king of Persia, Babylon and Asia, and created Macedonian colonies in Iran. After conquering the Achaemenid Empire of Persia, the Macedonian king (and now high king of the Persian Empire) Alexander launched a campaign in what is now Pakistan.
The rationale for this campaign is usually said to be Alexander's desire to conquer the entire known world, which the Greeks thought ended in north-western India. While considering the conquests of Carthage and Rome, Alexander died in Babylon on June 13, 323 BC. In 321 BC, two years after Alexander's death, Chandragupta Maurya of Magadha, founded the Maurya Empire in India.