Patchwork of small, independent petty kingdoms (fylker) ruling coastal and inland Norway before national unification, each under its own local king or jarl, known mainly through skaldic poetry and later saga tradition (e.g. the Ynglinga saga).
Unified by force under Harald Fairhair, traditionally dated to the Battle of Hafrsfjord (872 CE), forming the first Kingdom of Norway already tracked in the dataset ('Kingdom of Norway (872-1397)').
The atlas holds 2 border frames for Petty kingdoms of Norway — the shape you scrub through changes in 200 · 500.
Classic English-language survey covering the pre-unification petty kingdoms and Harald Fairhair's consolidation into the first Kingdom of Norway.