The Tughlaqs 1320 C.E. - 1412 C. E. The Tughlaqs also wished to rule the whole of India. Ghyasuddin's (1320 AD - 1325 AD) campaign to Warrangal, Orissa and Bengal were directed towards this end. He built the city Tughlaqabad near Delhi. By 1324 AD, the territories of the Delhi sultanate reached upto Madurai. However, his economic policy was not consistent with his political ambitions. As the Iqta holders were permitted their earlier perquisites, power gradually slipped back into the hands of nobles. Muhammad-Bin-Tughlaq (1325 AD - 1351 AD) succeeded his father and was referred to as an ill-starred idealist, whose experiments generally ended in failure. He extended the kingdom beyond India, into Central Asia. To meet the the expenses of the large army Muhammad increased the tax but the peasants refused and rebelled. Though the rebellion was suppressed, the taxation policy had to be revised. He decided to issue token coins in brass and copper which had the same value as silver coins. But due to the absence of a central mint, people began to forge the new coins, and the token coins had to be discontinued.