Nikolay Nikolayeviç Yudenich was born in 1862. After his military education, he served in various military staff and frontline positions. One of the missions that brought him to the fore in his career was the Russo-Japanese War. Shortly before the outbreak of World War I, he was appointed Chief of Staff of the Caucasus Military District. In December 1914, He had a significant impact on the Sarıkamış Operation, which resulted in the defeat of the 3rd Army. Yudenich prepared an attack plan in the Erzurum campaign, which lasted from the end of 1916 to February 1917. He displayed his military skills first in the capture of Erzurum by the Russians and then in the Trabzon operation. As of these dates, his reputation and prestige as a heroic soldier in Tsarist Russia increased. For Yudenich, the event that started a new era in his life was the February Revolution. In this process, Yudenich, who was appointed as the commander of the Caucasian Front, continued the offensive against the Turks. However, in the atmosphere brought by the revolution, the problems in the army caused the troops to be stopped and withdrawn. Soon Yudenich was removed from the front command for refusing to follow the Provisional Government's order to continue the offensive. He went to Finland in November 1918, where he joined the struggle against the Bolsheviks. Yudenich was given the task of leading the anti-Bolshevik movement in the north-west of Russia. Troops under his leadership advanced to Petrograd twice, in May-June and September-October 1919. However, the strong resistance of the Bolsheviks and the subsequent counter-offensive resulted in the defeat of the Yudenich armies. In January 1920, Yudenich announced the disbandment of the North-Western Army. Yudenich, who first settled in Nice, France, died on October 5, 1933 in Cannes.