Tiglath-Pileser III was the king of the Neo-Assyrian Empire from 745 BC to his death in 727. One of the most prominent and historically significant Assyrian kings, Tiglath-Pileser ended a period of Assyrian stagnation, introduced numerous political and military reforms and more than doubled the lands under Assyrian control. Because of the massive expansion and centralization of Assyrian territory and establishment of a standing army, some researchers consider Tiglath-Pileser's reign to mark the true 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.