History of Punjab,

Alexander left some forces along the Indus river region. In the Indus territory, he nominated his officer Peithon as a satrap, a position he would hold for the next ten years until 316 BCE, and in the Punjab he left Eudemus in charge of the army, at the side of the satraps Porus and Taxiles. Eudemus became ruler of the Punjab after their death. Both rulers returned to the West in 316 BCE with their armies, and Chandragupta Maurya established the Maurya Empire in India.