Stronghold in Mesopotamia? After r1 the brits will have (appr.) 5 inf and 2 art in TJ, 2 inf and 1art in Arabia (activate with 1 inf from Arfica with transport) and 4 inf and 2 art in Persia and 7 inf and 2 art in India.
Standard T1: attack Arabia with Meso+Syria (killing 1,5(2) troops and losing 1,5(2) moving Ankara to Meso and Const to Smyrna and 1inf from Const to Bulg.
B2: Retreat TJ to Eqypt. Reinforce Arabia with 2 inf from India(transport). Move 5 inf and 2 art to persia (9 inf and 4 art total. Buy: 5 inf, 2 art and 1 plan
T2: Turks have to move the Meso-units (6 inf and 1 art) or risk the attack from Persia B3, which is stupid (they lose 4,66 units and only kills 3,5).
Therefore The brits are free in B3 to reinforce Sevastianpol with 9 inf, 4 art and 1 plan (give or take) r3.
Feel free to point out any obvious mistakes on my account.