Answer:
The Ottoman Empire forming an alliance with the Central Power.
Step-by-step explanation:
The World War 1 or as name the Great War began in 1914 and lasted till 1918. It is also named as the Great War because every continent was affected by this war.
The War had three fronts: Western Front, Eastern Front, and Middle Eastern Front.
The Middle Eastern front was taken by the Ottoman Empire, who attacked Russia in 1914. The War in the Middle East was developed when the Ottoman Empire formed an alliance with the Central Powers namely Germany, Austria-Hungary, and Bulgaria.