One battle rarely wins or loses a war, at least in the moment. Gettysburg crippled Lee’s army in 1863, but the Confederates fought on until 1865. Stalingrad broke the back of the German 6th Army, but it would be two-and-a-half years before the Russians took Berlin. War – particularly the modern variety – is a complex mixture of tactics, technology, and politics. Then there are the intangibles, like morale.