Omar Pasha, also known as Omer Pasha Latas (, ; 24 September 1806 – 18 April 1871) was an Ottoman field marshal and governor. Born in Austrian territory to Serbian Orthodox Christian parents, he initially served as an Austrian soldier. When faced with charges of embezzlement, he fled to Ottoman Bosnia in 1823 and converted to Islam; he then joined the Ottoman army, where he quickly rose through the ranks. Latas crushed several rebellions throughout the Ottoman Empire, and served as a commander in the Crimean War of 1853-1856, where he won some outstanding victories at Silistra (1854) and Eupatoria (1855) and participated in the Siege of Sevastopol (1854–1855).