Note 1 — Chapter I · The First Battle of the War

The Mark or Margravate of Brandenburg was the beginning of the Kingdom of Prussia. The Nordmark, now in Saxony, was founded by Henry I in 928 to preserve certain German territory. In 1134 it was granted to Albert, who took the title of Margrave of Brandenburg. The mark was gradually extended during the next three centuries, and in 1618 the Duchy of Prussia was united to it. During the reign of Frederick William, the “Great Elector,” it was largely developed, and in 1700 it became the Kingdom of Prussia.