What used to be the mainland of Sweden, is now a splintered mess divided up into three minor states and a whole bunch of small communities that owe no one allegiance. However, the jury is still out on if one of the Swedish mainland states might rise to prominence. All of them have decent strategic positions. Svea is situated on the east coast, controlling the outlet of the former Göta kanal and thus profiting from inland trade. Göte sprung up on the west coast, at the mouth of the Kungsälven river. Vende is here an outlier, since it’s location on the south coast gives it no access to the river trade, but instead it serves as a stopping point for Pomeranian sailors on their way to Gotland.
In general, the Götes are fishers, the Vendes farmers and the Sveas are foresters. Of course, reality is always a bit more complex, but those are the largest professions in those communities.
What keeps holding the three kingdoms back are the ongoing border wars that seem to have no end. They don’t even fight each other, but instead smaller counties, duchies, republics, bandits and independent cities that have emerged in the post-destruction world. The reason for this is that after the destruction, there was no singular person who shaped the emerging societies like Henrik I in Peimar. Instead, the communities in the region have emerged more slowly and more organically, as population numbers has recovered slowly.
Vende has been blessed with a number of gifted monarchs over the years, so Vende has avoided the expansionist tendencies that have occupied Svea and Göte. However, the southern regions have had it’s share of various petty dictators and bandit kings, which has kept them back.
Svea is the most aggressive in it’s expansionism, though it has suffered grievous losses over the years. After an abortive invasion of the Åland islands, the navies of Hammerland and Kastelholm combined to raid Svea, burning down Stegeborg, the capital of Svea. After that, the Svea curtailed their expansionism and instead started settling the lake districts and the areas south of the massive ruins of Stockholm.
Göte has had problems with securing it’s eastern frontiers, but a greater issue has been the proximity of the ruins of Göteborg, forming a porous southern border through which beastmen, bandits and stranger things sneak through.