File talk:Turkish Crossroads (1951). Turkish Army.png

This picture obviously isn't from 1918. In 1918 just a few amounts of German type stahlhelms were in use in Turkey beside other hats like the Enveriye and kalpaks. In the first years of the republic the French Adrian helmet was introduced into the army. For pictures depicting this just google "Atatürk cenaze 1938". The British Brody helmet which you can see in your picture was introduced sometime around World War II. If you google "Atatürk anitkabir 1953" you can see some sample images. There is no evidence that this type of helmet was in use in 1918 in the Turkish army. Again the uniform in this picture is the type which was introduced together with the Brody helmet.