Nikolai Nikolayevich Yudenich was a commander of the Russian Imperial Army during World War I. He was a leader of the anti-communist White movement in northwestern Russia during the Civil War.

The White movement, also known as the Whites, was a loose confederation of anti-communist forces that fought the communist Bolsheviks, also known as the Reds, in the Russian Civil War (1917–1923) and that to a lesser extent continued operating as militarized associations of rebels both outside and within Russian borders in Siberia until roughly World War II (1939–1945). The movement's military arm was the White Army, also known as the White Guard or White Guardsmen.