 Secondly, the need to accumulate land for endowments, as well as for awards for soldiers and servicemen, drove the active development of new lands.The earliest irrigation projects focused on Kyaukse where Burmans built a large number of new weirs and diversionary canals, and Minbu a similarly well-watered district south of Pagan.After these hubs had been developed, in the mid-to-late 12th century, Pagan moved into as yet undeveloped frontier areas west of the Irrawaddy and south of Minbu.