Rubuta ci gaba don wannan sakin layi - A cikin 1630, Gustavus Adolphus na Sweden ya mamaye Pomerania tare da kuɗin Faransa, da tallafi daga Saxony da Brandenburg-Prussia. Bayan mutuwarsa a Lützen a shekara ta 1632, Sweden ta kafa Heilbronn League; ya ƙunshi ƙananan jihohin Furotesta kuma Faransa ta ba da kuɗi, League ta sami jerin nasarori, har sai da aka ci nasara a Nördlingen
a shekara ta 1634.