If this conflict really is zero sum then a lease over the whole of Crimea is a big loss to Ukraine; it is after all losing a whole province in return for some financial assistance. Moreover we have little evidence that it really would mean Russia getting what it wants; Russia continues to deny that it even has military forces in Crimea, “these were local self-defence forces”, let alone spell out to the world exactly what its objectives are. President Putin says “This is a humanitarian mission” that “corresponds with our interests of protecting people who are historically tied to us”. If protection is all that is necessary then a lease should not be necessary. [1]  [1] Siddique, Haroon, ‘Putin: Yanukovych ousting was ‘unconstitutional overthrow’’, theguardian.com, 4 March 2014