Assertion: dynasty's empire | /r/CapableOf | embrace much of eastern sumatra
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Source sentences:
text: Tun Perak thereafter played a dominant role in the history of the state, securing the succession of the next three rulers—Sultans Mansur Shah, reigned about 1459–77; Alaʾud-din, 1477–88; and Mahmud Shah, 1488–1511, all of whom were related to him—and pursuing an aggressive foreign policy that saw the sultanate established as a tributary empire embracing the whole of the Malay Peninsula and much of eastern Sumatra.