Hacı Topal Osman Ağa (1883 – 2 April 1923) was a Turkish officer, a militia leader of the National Forces, a volunteer regiment commander of the Turkish army during the Turkish War of Independence who eventually rose to the rank of lieutenant colonel, and was a perpetrator of the Armenian and Pontic genocides. He was the commander of Mustafa Kemal's special Bodyguard Regiment. He showed usefulness in the War of Independence, but in 1923, when it was decided that he was the instigator of Trabzon Deputy 's murder, he was detained. He was captured and injured during the clashes, but he was killed by İsmail Hakkı Tekçe. Early life and Balkan Wars He was born in Giresun in 1883 and was of Turkish origin, more particularly the Chepni tribe. His father, Feridûnzâde Hacı Mehmet Efendi, was a hazelnut merchant. In his youth he helped with the family business and became a partner in a sawmill. He married and had two sons. Despite his father paying his military service price, he refused to stay and joined the 1912–1913 Balkan Wars with his 65 friends. They fought in Çorlu. A Bulgarian cannonball wounded his right kneecap during the war. He refused to have his leg amputated, so the doctors only took out the shrapnel from his knee without anesthesia, causing him to become lame (). World War I While still limping, Osman Ağa joined World War I with 93 friends, later joined by 6 prisoners in Trabzon. They charged the Russian army, causing many casualties for the Russians but also the death of 6 friends of Osman Ağa. During the war, he caught typhoid, leading to him returning to Giresun. After recovering, he returned to the war. He joined the 37th Division in Bayburt, which eventually retreated to Harşit. The Russians couldn't go any further. Osman Ağa returned to Giresun to recruit more soldiers and went back to fight with 1500 young volunteers. After the October Revolution took place, the Russians withdrew from the battle, leading the Turks to reconquer Batum. Osman Ağa's battalion was the first one to enter Batum. Armenian and Greek genocides Topal Osman was known to have been responsible for massacres against Armenians and Greeks during the Ottoman civil war in the Pontus region where he was stationed during World War I. While in Trabzon, Osman made a name for himself in the spring of 1915 as commander