Kammala jumla mai zuwa: Sweden ta mallaki, a wani lokaci, ikon manyan hanyoyin kasuwanci na Baltic; kuma karuwar kudaden shiga da ya samo asali daga wannan matsayi na umarni ya kasance na taimako na kayan aiki a lokacin farkon matakan yaƙin a Jamus, inda sarkin Sweden Gustavus II Adolphus ya tura sojojinsa a watan Yunin 1630. Gustavus, wanda daga baya aka kira shi "Zaki na Arewa" saboda ƙwarewarsa a matsayin kwamandan, ya shiga tsakani a bangaren Furotesta a yakin basasa na Jamus. Ta amfani da sabbin dabarun soja kamar su makamai masu sauƙi da na'urori masu motsi, yawancin sojojinsa masu amfani da bindigogi (a maimakon pikes), da dabarun hargitsi na sojan doki, ya ci nasara a yakin Breitenfeld a shekarar 1631. A cikin yakin Lützen a ranar 6 ga Nuwamba, 1632, ya hau kan ƙungiyar mahayan dawakai na abokan gaba kuma aka kashe shi. Yaƙin da kansa ba shi da nasara. Shekaru biyu bayan haka sojojin Imperial sun sami nasara a kan sojojin Protestant a
A cikin Nördlingen. Domin ya hana Habsburgs cin yaƙin, Faransa, wadda ta riga ta ba da tallafi mai yawa ga Sweden, ta sa baki a ɓangaren Furotesta. Yaƙin ya ci gaba har tsawon shekaru har sai da aka cimma yarjejeniyar zaman lafiya a shekara ta 1648. A cikin Zaman Lafiya na Westphalia Sweden ta sami diyya, da kuma kula da Yammacin Pomerania da bishopric na Bremen da Verden. Ta haka ne ya sami iko da bakin Oder, Elbe, da Weser Rivers, kuma ya sami muryoyi uku a cikin Majalisar Sarakuna na Reichstag ta Jamus.