Considering Maskirovka

"Soon after Josef Stalin signed a mutual defense pact with Adolf Hitler, British Prime Minister Winston Churchill said that Russia was a mystery wrapped in an enigma. Russian military planners were undoubtedly pleased by what they might have taken as praise. One of the foundations of their military doctrine is the principle of maskirovka, or the use of various deceptions and denials to mask their true intentions. Maskirovka doesn’t always work, but when it does, it can utterly transform a battle, even a war." George Friedman