large army reinforcements for his son asking him to attempt plundering Arangal and Tilang again. This time Jauna Khan succeeded. Arangal fell, was renamed to Sultanpur, and all plundered wealth, state treasury and captives were transferred from the captured kingdom to Delhi Sultanate. The Muslim aristocracy in Lukhnauti (Bengal) invited Ghiyasuddin Tughlaq to extend his coup and expand eastwards into Bengal by attacking Shamsuddin Firoz Shah, which he did over 1324–1325 AD, after placing Delhi under control of his son Ulugh Khan, and then leading his army to Lukhnauti. Ghiyasuddin Tughlaq succeeded in this campaign. As he and his favorite son Mahmud Khan were returning from Lakhnauti to Delhi, Ghiyasuddin Tughlaq's eldest son Jauna Khan schemed to kill him inside a wooden structure (kushk) built without foundation and designed to collapse, making it appear as an accident. Historic documents state that the Sufi preacher and Jauna Khan had learnt through messengers that Ghiyasuddin Tughlaq had resolved to remove them from Delhi upon his return. Ghiyasuddin Tughlaq, along with Mahmud Khan, died inside the collapsed kushk in 1325 AD, while his eldest son watched. One official historian of Tughlaq court gives an alternate fleeting account of his death, as caused by a lightning bolt strike on the kushk. Another official historian, Al-Badāʾunī ʻAbd al-Kadir ibn Mulūk-Shāh, makes no mention of lightning bolt or weather, but explains the cause of structural collapse to be the running of elephants; Al-Badaoni includes a note of the rumor that the accident was pre-planned. Patricide According to many historians such as Ibn Battuta, al-Safadi, Isami, and Vincent Smith, Ghiyasuddin was killed by his son Ulugh Juna Khan in 1325 AD. Juna Khan ascended to power as Muhammad bin Tughlaq, and ruled for 26 years. Muhammad bin Tughluq During Muhammad bin Tughluq's rule, Delhi Sultanate temporarily expanded to most of the Indian subcontinent, its peak in terms of geographical reach. He attacked and plundered Malwa, Gujarat, Mahratta, Tilang, Kampila, Dhur-samundar, Mabar, Lakhnauti, Chittagong, Sunarganw and Tirhut. His distant campaigns were expensive, although each raid and attack on non-Muslim kingdoms brought new looted wealth and ransom payments from captured people. The extended empire was difficult to retain, and rebellions all over Indian subcontinent became routine. He raised taxes to levels where people refused to pay any. In India's fertile lands between Ganges and Yamuna rivers, the Sultan increased the land tax rate on non-Muslims by tenfold in some