The British Isles

Two islands off the Frankish coast, worked out separately: a Scandinavian settlement carved into the middle of a single Anglo-Saxon kingdom's own rise, a conquest that replaced its ruling class outright, and a northern kingdom that stayed formally independent for eight centuries before a treaty, not a battle, ended it.

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 Kingdom of France. 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.