Ka cika wannan jumla: A lokacin Yaƙin Shekaru talatin, Sweden ta ci kusan rabin ƙasashen Roma Mai Tsarki kuma ta ci sojojin Daular a Yaƙin Breitenfeld a shekara ta 1631. Gustav Adolphus ya shirya ya zama sabon Sarkin sarakuna na Romawa Mai Tsarki, yana mulki a kan Scandinavia da kuma jihohin Romawa Mai Tsarki, amma ya mutu a yakin Lützen a shekara ta 1632. Bayan da
Yaƙin Nördlingen a shekara ta 1634, babban nasarar da Sweden ta yi a yaƙin, jin daɗin Sweden a tsakanin jihohin Jamus ya ɓace. Wadannan lardunan Jamus sun cire kansu daga ikon Sweden daya bayan daya, suna barin Sweden tare da wasu yankuna na arewacin Jamus: Swedish Pomerania, Bremen-Verden da Wismar. Daga 1643 zuwa 1645, a cikin shekarun ƙarshe na yaƙin, Sweden da Denmark-Norway sun yi yaƙin Torstenson. Sakamakon wannan rikici da ƙarshen Yaƙin Shekaru talatin ya taimaka wajen kafa Sweden bayan yaƙin a matsayin babbar iko a Turai.