
Go Rin No Sho (1645), The Fire Book
The Other World (1657)
Context: Even if a king defeats his enemy in battle, that still doesn't settle anything. There are other, less numerous armies of philosophers and scientists, and their contests determine the true triumph or defeat of nations.
One scholar is matched with another; one creative mind with another; and one judicious temperament with his counterpart. A victory won on that field counts for three won by force of arms.
Go Rin No Sho (1645), The Fire Book
Translation by Lionel Giles
Source: The Art of War, Chapter IV · Disposition of the Army
History of the Thirty Years War - Volume II
Attitude of the Imperial/League army after the protestant victory at Brietenfeld.
The Thirty Years War
Speech to Red Army personnel, 13 May 1940
Source: http://www.warmech.ru/1941war/sher_4.html
“To surprise the enemy is to defeat him.”
As Military Adviser in China - Page 245 by Aleksandr Ivanovich Cherepanov - China - 1982.
“We've defeated the wrong enemy”
It is unknown if Patton ever said these precise words. However, Anthony Cave Brown notes https://skeptics.stackexchange.com/questions/36062/did-gen-patton-say-we-defeated-the-wrong-enemy/36063#36063 in Bodyguard of Lies Volume II that "Patton was relieved of command of the 3rd Army by Eisenhower just after the end of the war for stating publicly that America had been fighting the wrong enemy— Germany instead of Russia", so it is at least an accurate paraphrase. For further discussion, see relevant threads on skeptics.stackexchange.com https://skeptics.stackexchange.com/questions/36062/did-gen-patton-say-we-defeated-the-wrong-enemy and /r/AskHistorians https://www.reddit.com/r/AskHistorians/comments/640pg5/what_did_general_george_s_patton_mean_when_he/.
Disputed
“An army which cannot be reenforced is already defeated.”
Napoleon : In His Own Words (1916)