Rubuta ci gaba don wannan sakin layi - The Estates zaba Charles X Gustav a matsayin sabon Sarkin su kuma gajeren mulkinsa ya fi dacewa da yaƙe-yaƙe na waje: na farko yaƙin neman zaɓe a cikin Poland
sa'an nan kuma tare da Denmark. A cikin wannan yanayin na ƙarshe, haɗarin 1658 Maris a ƙetaren Belts wanda ya haifar da Yarjejeniyar Roskilde, zai tabbatar da cewa shine mafi girman cinikin yanki na dindindin da Sweden ta taɓa samu: Skåne, Blekinge da Bohuslän yanzu sun zama lardunan Sweden kuma sun kasance haka tun daga lokacin. Charles X Gustav bai gamsu ba, kamar yadda yake so ya murkushe Denmark sau ɗaya da duka, amma Harin 1659 a Copenhagen bai yi nasara ba ga Swedes, yawancinsa saboda sa hannun sojojin ruwa na Dutch don taimakawa Danes.