In eastern Anatolia Turkish forces are advancing to recover the territory lost since the war started and to occupy the three lost provinces promised to them by the Treaty of Brest-Litovsk. The Turks also want to stake their claim to as much of the Russian territory south of the Caucasus as possible. That the Turks should be expending so much effort here when they are under pressure from the British in Palestine might seem strange, but Enver Pasha, Turkey’s war minister and paramount leader, sees this as a chance to restore the prestige of the Ottoman Empire. Enver also wants to rescue Turkic peoples of the Caucasus from the horror of government by Christians.
A good command of logistics has not been a strong point of the Turkish army, so it should be difficult for it to maintain this rapid advance. However Turkish troops are able to sustain themselves on what the Russians have abandoned. Today Turkish forces recapture Erzurum, whose loss in 1916 was a terrible blow. They find the city abundantly stocked with supplies left behind by the Russians, supplies the Turks can now use as they press on towards the pre-war frontier.
Erzurum after abandonment by the Russians (Wikipedia: Schlacht von Erzurum)