text: Frederick's most notable military victories on the battlefield were the Battle of Hohenfriedberg, a tactical victory, fought during the War of Austrian Succession in June 1745; the Battle of Rossbach, where Frederick defeated a combined Franco-Austrian army of 41,000 with only 21,000 soldiers (10,000 dead for the Franco-Austrian side with only 550 casualties for Prussia); and the Battle of Leuthen, in which Frederick's 39,000 troops inflicted 22,000 casualties, including 12,000 prisoners, on Charles of Lorraine's Austrian force of 65,000.
  Frederick believed that creating alliances was necessary, as Prussia did not have the resources of nations like France or Austria. Though his reign was regularly involved in war, he did not advocate for protracted warfare. He stated that for Prussia, wars should be short and quick: long wars would destroy the army's discipline, depopulate the country, and exhaust its resources.
  Frederick was an influential military theorist whose analysis emerged from his extensive personal battlefield experience and covered issues of strategy, tactics, mobility and logistics. Emperor Joseph II wrote, "When the King of Prussia speaks on problems connected with the art of war, which he has studied intensively and on which he has read every conceivable book, then everything is taut, solid and uncommonly instructive. There are no circumlocutions, he gives factual and historical proof of the assertions he makes, for he is well versed in history."
  Robert Citino describes Frederick's strategic approach: