Rubuta ci gaba don wannan sakin layi - Ganin damar da za a raba yarjejeniyar Brømsebro, Sarki Frederick III na Denmark, a cikin 1657, ya yi yaƙi da Sweden, wanda ya shiga cikin Yaƙin Arewa na biyu (1655<unk>1660), kuma ya yi tafiya zuwa Bremen-Verden. Wannan ya haifar da babbar shan kashi na Danish yayin da sojojin Sarki Charles X Gustav na Sweden suka ci Jutland kuma, bayan Yakin Sweden a kan daskararren Danish, sun mamaye Funen da yawancin Zealand kafin sanya hannu kan Zaman Lafiya na Roskilde a watan Fabrairun 1658, wanda ya ba Sweden iko da Scania, Blekinge, Bohuslän, Trøndelag, da tsibirin Bornholm. Charles X Gustav da sauri ya yi nadama da bai lalata Denmark ba kuma a watan Agusta 1658, ya sake kai hari na biyu a kan Denmark, ya ci nasara da yawancin tsibirin Danish, kuma ya fara kewaye da Copenhagen na tsawon shekaru biyu. Sarki Frederick III ya ja-goranci tsaron birnin, ya sa mazauna garin su ɗauki makamai, kuma ya hana 'yan Sweden kai hari
Ka yi haƙuri. Siege ya ƙare bayan mutuwar Charles X Gustav a 1660. A cikin zaman lafiya da ya biyo baya, Denmark ta sami damar ci gaba da 'yancin kai da kuma sake mallakar Trøndelag da Bornholm. Samun babban farin jini bayan yaƙin, Frederick III ya yi amfani da wannan don rushe mulkin mallaka na zaɓe don ya goyi bayan cikakken mulkin mallaka, wanda ya kasance har zuwa 1848 a Denmark.