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. These new lands included both irrigable wet-rice areas and non-irrigable areas suitable for rain-fed rice, pulses, sesame, and millet. Agricultural expansion and temple construction in turn sustained a market in land and certain types of labour and materials. Land reclamation, religious donations, and building projects expanded slowly before 1050, increased to 1100, accelerated sharply with the opening of new lands between c. 1140 and c. 1210 and continued at a lower level from 1220 to 1300.