The Depalpur Tehsil, in the Okara District is older than Mohenjo-daro. It is officially the largest tehsil in Pakistan. Pakpattan near Okara City is also very old. During the British rule in the 19th century, there was a forest of Okaan trees where city is built. During British rule, Okara was considered part of Pakpattan. It was a city many famous fighters and soldiers who came here or passed the city. This includes Alexander the Great (Sikandar-e-Azam) and Changez Khan etc.