The army count during the 2nd Northern War was ca. 320,000, as 300,000 attacked the Northern Kingdoms, while the remaining 20,000 — 50,000 remained in the Empire to defend core provinces like Nilfgaard, Etolia, Gemmera or / and Vicovaro. While the Army is officially led by the Emperor, a high-ranking officer known as a Field Marshal leads the men in the field. During greater conquests and invasions (like that of the North) armies are normally divided to groups.