“It is quite possible for a work of literature to operate as a war machine upon its epoch.”
“Secret operations are essential in war; upon them the army relies to make its every move.”
Source: The Art of War, Chapter XIII · Intelligence and Espionage
Original
此(译注:用间)兵之要,三军之所恃而动也。
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Sun Tzu 68
ancient Chinese military general, strategist and philosophe… -543–-495 BCRelated quotes

“What is essential in war is victory, not prolonged operations.”
Source: The Art of War, Chapter II · Waging War

On Coalition Government (1945)

Gémìng zhànzhēng shì qúnzhòng de zhànzhēng, zhǐyǒu dòngyuán qúnzhòng cáinéng jìnxíng zhànzhēng, zhǐyǒu yīkào qúnzhòng cáinéng jìnxíng zhànzhēng.
Chapter 8 https://www.marxists.org/reference/archive/mao/works/red-book/ch08.htm, originally published in Be Concerned with the Well-Being of the Masses, Pay Attention to Methods of Work (January 27, 1934), Selected Works, Vol. I. p. 147.
Quotations from Chairman Mao Zedong (The Little Red Book)

" Beware The Atavistic Dynamics Undergirding Two American Wars, https://misesuk.org/2017/06/21/beware-the-atavistic-dynamics-undergirding-two-american-wars/" The Ludwig von Mises Centre For Property and Freedom, June 21, 2017.
2010s, 2017

As quoted in Stonewall Jackson and the American Civil War (1904) by George Francis Robert Henderson http://www.gutenberg.org/etext/12233, Ch. 25 : The Soldier and the Man, p. 481
Context: War means fighting. The business of the soldier is to fight. Armies are not called out to dig trenches, to throw up breastworks, to live in camps, but to find the enemy and strike him; to invade his country, and do him all possible damage in the shortest possible time. This will involve great destruction of life and property while it lasts; but such a war will of necessity be of brief continuance, and so would be an economy of life and property in the end. To move swiftly, strike vigorously, and secure all the fruits of victory is the secret of successful war.

Source: The Art of War, Chapter XIII · Intelligence and Espionage
2015, What Does Rockville, Maryland's Confederate Monument Tell Us About the Civil War? About the Nadir? About the Present? (July 2015)
Context: The Thin Grey Line' came through Montgomery and Frederick counties at least three times, en route to Antietam in 1862, Gettysburg in 1863, and Washington in 1864. Lee's army expected to find recruits and help with food, clothing, and information. This did not happen, although the army did kidnap every African American it came upon, dragging them back into Virginia as slaves. In a further irony, on the courthouse grounds not far from the Confederate monument, a historical marker tells of J. E. B. Stuart's 1863 raid nearby, in which he captured 'as many as a hundred' African Americans and enslaved them, but they are invisible. The marker only mentions the capture of '150 U. S. wagons'. During the first invasion, Maryland residents greeted Union soldiers 'as liberators' when they came through on their way to Antietam, according to historian William F. Howard. During the last invasion, when Confederate cavalry leader Jubal Early came through, he demanded and got $300,000 from the leading merchants of Frederick, lest he burn their town, a sum equal to at least five million dollars today.