Rubuta ci gaba don wannan sakin layi - Faransa ta goyi bayan Jamhuriyar Holland a yakin da suka yi da Spain, da kuma bayar da kuɗin farko na Danish, sa'an nan kuma Yaren mutanen Sweden a cikin Empire. A shekara ta 1630, Gustavus Adolphus na Sweden ya mamaye Pomerania; a wani ɓangare don ya tallafa wa 'yan'uwansa Furotesta masu bin addini, ya kuma nemi iko da kasuwancin Baltic, wanda ya ba da yawancin kuɗin Sweden. Wadannan masu tafiyar da tattalin arziki sun nuna cewa harin Sweden ya ci gaba bayan mutuwarsa a 1632, amma ya haifar da rikici da Saxony, Brandenburg-Prussia da Denmark-Norway. Rashin nasara a Nördlingen
a watan Satumba na 1634 ya tilasta wa Swedes su koma baya, yayin da yawancin abokansu na Jamus suka yi zaman lafiya tare da Ferdinand a cikin Yarjejeniyar Prague (1635).