Mgbe Eze Sweden Gustavus Adolphus nke Sweden meriri ndị agha Imperial nke Tilly duziri na Agha Breitenfeld (1631), ndị agha ya meghere maka ndịda Germany niile. N'oge Krismas nke afọ 1632, ọchịagha ndị Sweden bụ́ Gustav Horn pụtara n'ọnụ ụzọ ámá Freiburg. Freiburg chịliri aka elu na 30 Disemba 1632. Mgbe ndị Spen, bụ́ ndị Duke nke Feria duziri, rutere n'obodo ahụ n'afọ 1633, ndị Sweden hapụrụ obodo ahụ ma weghachi ya mgbe otu afọ gasịrị. Mgbe mmeri ndị Spen na nke ndị eze ukwu meriri n'Agha Nördlingen
na 1634 n'elu ndị agha Protestant nke General Horn na Wettin Duke Bernard nke Saxe-Weimar duziri, ndị Sweden mechara hapụ ndịda Germany ma si otú a hapụ Freiburg.