Sweden's intentions in the province were first and foremost focused on defense, which led to an enormous burden for the Jamtish farmers to bear. The Jamts managed to enforce a treaty in 1688 which stated that Jamts were under no circumstances obligated to defend anything but their own province. This treaty was eventually broken by king Charles XII and Jamts participated in Carl Gustaf Armfeldt's Norwegian campaign during the Great Northern War. The campaign was unsuccessful and when Charles XII died in southern Norway Armfeldt marched back to Jämtland. On New Year's Eve 1718 a massive blizzard arose and over 3 000 Caroleans succumbed in Jämtland's mountains mostly due to poor clothing. The time that followed "the Age of Liberty" brought changes to the province's agriculture, with significances such as the potato and better granaries. The standard of living was greatly improved during this period.