Original sentence: He encountered a city mostly depleted of its Muslim population, with over 10K murdered by Armenian Revolutionaries under the leadership of Antranik from Tiblisi.It was Kâzım Karabekir Paşa who recovered Erzurum from Russian and Armenian occupation in early March 1918.It was returned to the Ottomans officially with the Treaty of Brest-Litovsk in March 1918
Edited sentence: It was returned to the Ottomans with the Treaty of Brest-Litovsk in March 1918