Wars end when one or both sides decide that peace — or at least a suspension of hostilities — is better than fighting. But how they come about, as well as why, matters a great deal.
Ukraine has been mounting a war of national defence for 18 months. In that time, it has bravely protected its capital and retaken territory from Russia. It is now engaged in a wider counter-offensive that has run into well constituted and entrenched Russian defences.
