While Norrland was not supposed to be included in this main central defence strategy, studies on how to defend this major part of the country were still conducted. However, northern Sweden was generally considered of very limited military interest and unsuitable for larger military operations due to the bad state of most of the roads, the large uninhabited areas, the large rivers and the very limited economical gain that the lands provided. The first of these studies, laid down by the Fortification Committee of 1819 ()—which was largely influenced by the committee's secretary Johan Peter Lefrén—led to nothing more than the opinion that the large rivers up north—especially the Ångerman River—would benefit the defence and that no major fortifications were to be built. In another study from 1824, colonel—and much later Swedish Minister for War—Gustaf Oscar Peyron suggested that it would be better to fortify positions just south of Boden—along the more northern Lule River—for example at Sävast or Avan. However no major changes were made, partially due to the limited military interest, but also because of the large amounts of money that was spent on building Karlsborg Fortress and modernizing other older fortifications in southern Sweden.