It has become commonplace to observe that Ukraine is mired in a “long war” — one that could last for years, according to NATO’s secretary general. That could well be correct. The war, after all, has already lasted nearly five months and continues to grind on. But I fear that by so readily accepting that there is no end in sight, we might be giving in to fatalism and defeatism. Instead of becoming resigned to a never-ending war, the West should be focusing on how to shorten the conflict by enabling Ukraine to win.