This region's native people worshipped at altars c
This region's native people worshipped at altars called irminsuls, and its territory was split into Ernestine and Albertine branches. This region was one of the(*)  four secular electorates of the Holy Roman Empire, and it was ruled for most of its history by the House of Wettin. The Seven Years' War originated when Frederick the Great invaded this region, and this region led the neighboring state of Anhalt in a personal union. For ten points, name this German state with capital Dresden, whose namesake people underwent a migration with the Angles.
This region's native people worshipped at altars called irminsuls, and its territory was split into Ernestine and Albertine branches.
Saxony