Tiglath-Pileser III was the Neo-Assyrian emperor from 745 BC to his death in 727. One of the most prominent and historically significant Assyrian rulers, Tiglath-Pileser ended a period of Assyrian stagnation, introduced numerous political and military reforms, and doubled the lands under Assyrian control. Because of the massive expansion and centralization of Assyrian territory and the establishment of a standing army, some researchers consider Tiglath-Pileser's reign to mark the actual transition of Assyria into an empire. The reforms and methods of control introduced under Tiglath-Pileser laid the groundwork for policies enacted not only by later Assyrian kings but also by later empires for millennia after his death.