Java and Bali
One island's rice, and the seven hundred years of kingdoms that lived on it — an unbroken sequence from the Brantas valley to the division of Mataram, plus the western kingdom that was never part of it and the Balinese court that inherited what Java gave up.
The line below is a time axis. Position on it is date, so concurrency is visible: concurrent polities sit side by side rather than in sequence.
1 sourced edge runs between this region and another, to Srivijaya. Those are not drawn on this line — a thread that crossed regions would assert a sequence nobody cited — but they are on each polity’s own page.