*The west must be ready for this moment of opportunity and risk in Ukraine.* The article includes a theory of how Ukraine hopes to achieve a military victory sufficient to end the war.

It may be true that Putin is obsessed even more with Crimea than with Ukraine; I wouldn't know. But I don't see a rational military reason for him to feel that way. Moreover, I don't see why Ukraine should be especially concerned with Crimea in Putin's hands as a military threat. Russia has plenty of air bases from which to attack various parts of Ukraine, and it has made some attacks from airbases near Moscow, which Ukraine has attacked with drones.