This is actually related to the mobilization of the Ottoman Empire. The total population of the Ottoman Empire is just over twenty million people. With such a small population and underdeveloped industry, the Ottoman Empire simply couldn't support the logistics of a larger army.
If Russia hadn't suddenly collapsed and if countries like Austria-Hungary could spare troops to support the Ottoman Empire, the Ottoman Empire truly wouldn't have been able to hold on.
This can be seen from the moment the United Kingdom began its offensive against the Ottoman Empire. At that time, the Ottoman Empire's army could be said to fall apart at the first touch. Luckily, with the Baghdad railway open, ally reinforcements could arrive in time to prevent the worsening of the Ottoman Empire battlefield, eventually turning defeat into victory with the help of allies like Austria-Hungary.
