So ITTL, the Ottomans do much, much better than OTL, but the CPs still lose the war by late 1918. How does the peace treaty with the Sublime Porte look like, considering the British & French were willing, by one account I read, to have settled for far less than they got OTL if the Turks pushed the issue (which they didn't).
As for the specifics:
- El-Arish, , or at worst the Gaza - Beersheba line, are still in Ottoman hands
- the Suez Canal was raided a couple of times before the Allied forces got too numerous
- some more capital ships were sunk at Galipoli
- no Entente submarines managed to sneak into the Marmara, avoiding those losses
- the evacuation of the Anzac's at Galipoli was seriously contested, and many tens of thousands were taken prisoner
- Sarikamish was a Turkish victory; no Armenian genocide
- Arab revolt utterly crushed
- control over most of Arabia established, Saudis crushed
- Aden temporarily taken at the start of the war, hotly contested afterwards
- oil installations in southern Iran raided and wrecked at the start of the war
- Kuwait taken at the start of the war, only abandoned years later, and now on the verge of falling again after an overextended Allied offensive is crushed (think Siege of Kut on steroids)
- Azerbaijan and northern Iran are taken by the Ottomans in the aftermath of the Russian revolution
As for the specifics:
- El-Arish, , or at worst the Gaza - Beersheba line, are still in Ottoman hands
- the Suez Canal was raided a couple of times before the Allied forces got too numerous
- some more capital ships were sunk at Galipoli
- no Entente submarines managed to sneak into the Marmara, avoiding those losses
- the evacuation of the Anzac's at Galipoli was seriously contested, and many tens of thousands were taken prisoner
- Sarikamish was a Turkish victory; no Armenian genocide
- Arab revolt utterly crushed
- control over most of Arabia established, Saudis crushed
- Aden temporarily taken at the start of the war, hotly contested afterwards
- oil installations in southern Iran raided and wrecked at the start of the war
- Kuwait taken at the start of the war, only abandoned years later, and now on the verge of falling again after an overextended Allied offensive is crushed (think Siege of Kut on steroids)
- Azerbaijan and northern Iran are taken by the Ottomans in the aftermath of the Russian revolution