Özdemiroğlu Osman Pasha  Özdemiroğlu Osman Pasha (""Osman Pasha, the son of Özdemir""; 1526 – 29 October 1585) was an Ottoman statesman and military commander who also held the office of grand vizier for one year. After the Ottoman conquest of Egypt in 1517, the former Mameluk elite (Turks and Circassians) had accepted the Ottoman dominance and became the part of Ottoman bureaucracy and military. Özdemir Pasha, Osman's father, was one of them. After the Indian Ocean campaigns, he was appointed as the beylerbey (high governor) of Habesh Eyalet (modern Ethiopia, but practically only the coastal strip of Eritrea and Sudan). Osman was born in 1526 in Cairo, a part of Egypt Eyalet (province) of the Ottoman Empire. Osman was appointed to various posts in Egypt by the porte. After his father's death in 1561, Osman continued as the governor of Habesh Eyalet for 7 years. In 1569, he was appointed as the governor of Yemen and in 1573, as the governor of Diyarbekir Eyalet (modern Diyarbakır, Turkey). While in Diyarbekir, he was assigned to join the army during the Ottoman–Safavid War (1578–1590). His troops fought well and contributed much to the victory during the Battle of Çıldır. After the battle, he was assigned to organize the newly conquered territories in the Caucasus. While establishing an effective Ottoman administration, he also had to fight against Persians who were trying to regain their losses. In 1583, he fought against a Persian army in Baştepe a location in North Caucasus (modern Dagestan Republic of Russia) in a three-day clash named Battle of Torches, (named so because the battle continued into the night). He defeated the Persian army and secured Ottoman presence in the Caucasus. His next mission was dethroning the Crimean khan Mehmed II Giray, who was an unreliable vassal, and enthroning a new khan, in which he was also successful. Then, from Crimea he sailed to Istanbul, the capital, where he was praised by the sultan Murat III. On 28 May 1584, he was promoted to be the grand vizier, also keeping the title of high commander of the army ().