With a POD in 1914, and without significantly changing the military course of war, make it so that during the Russian Civil War the Emperor and his troops flee to resettle in Istanbul(perhaps redeclared as Constantinople?) and secure a defensible perimeter against both Turks and Soviets.
Possible reasons why Entente would accept this:
1. Russian emigres could resettle in this area.
2. Due to personal ties between Russian and British royalty, Britain gains secured access to Black Sea.
3. Soviets cannot penetrate the Mediterranean.
4. ???
Possible reasons why Entente would accept this:
1. Russian emigres could resettle in this area.
2. Due to personal ties between Russian and British royalty, Britain gains secured access to Black Sea.
3. Soviets cannot penetrate the Mediterranean.
4. ???