Osman Nuri was born in 1832 in Tokat, in northern Anatolia, into the prominent Muslim Turkish Yağcıoğulları family. He entered the Ottoman army's Cavalry Arm at the start of the Crimean War, and his bravery there earned him a promotion to first lieutenant — a pattern that would repeat throughout a career defined by performance under pressure. By 1873 he had risen to lieutenant general and had served in Rumelia, Scutari, and Bosnia, building a reputation as a capable and combative commander who was sometimes difficult to work alongside. His assignment to the Vidin region in 1876 positioned him for the moment that would define his life.

When Russia declared war on the Ottoman Empire in April 1877 and crossed the Danube into Bulgaria, Osman was ordered to reinforce the fortress at Nikopol. He arrived too late — Nikopol had fallen on 16 July. But where another commander might have retreated, Osman saw an opportunity. He moved his army 20 miles south to Plevna, a small town surrounded by hills and ravines, and began fortifying. His troops had Krupp breech-loading artillery, long-range Peabody-Martini rifles, and Winchester repeaters — weapons that outranged the Russian infantry attacking across open ground. The first Russian assault on 20 July was repulsed easily. The second attack on 31 July cost the Russians 10,000 men. The third, in September, cost them roughly 20,000. Total Russian and Romanian losses from the beginning of the siege reached up to 50,000. The military world was watching; Plevna was making reputations.

By October the Russian-Romanian army had fully encircled the town, cutting off supply lines. Osman asked permission to withdraw before the trap closed. It was denied. General Eduard Ivanovich Todleben — veteran of the great siege of Sevastopol — arrived to take command of the encirclement, and he was not a man who made mistakes. As December came and starvation set in, Osman made his decision: a night attack on 9 December, aimed at breaking through the Russian line. His troops nearly broke through. Then the Russians recovered. The breach closed. Romanian forces stormed the rear defenses, cutting off retreat to Plevna. Osman, wounded in the leg, fell from his horse; panic spread at the rumor of his death. He surrendered the next morning to Colonel Mihail Cerchez. The Siege of Plevna was over — five months after it began.

Osman Nuri Pasha returned from Russian captivity in 1878, after the Treaty of Berlin settled the war. Constantinople received him as a hero. Sultan Abdülhamid II promoted him to Field Marshal and awarded him the title *Gazi* — warrior, victor — along with the Order of the Medjidiye in Gold and the Imtiyaz Medal. He became Marshal of the Palace. The Ottoman military march composed in his honor, the *Plevna March*, is still used by the Turkish armed forces today. He served as War Minister on four occasions in the years that followed. When he died in Constantinople on the night of 4 to 5 April 1900, he was buried next to the Mosque of Fatih Sultan Mehmet at his own request, his tomb commissioned personally by the sultan. The flag draped over his tomb was still being renewed a century later. Turkey remembers him as a figure of gallant perseverance in the face of impossible odds — not despite the defeat at Plevna, but because of how he bore it.