Allies arm Ukraine to defend their own democracies

Aseismic shift is underway in the U.S.-led coalition’s Ukraine strategy. The goal is no longer just to help the Ukrainians hold off Vladimir Putin’s invasion. It is to help them win the war outright.

The allies recognize that such a victory is far from assured, and would come neither easily nor quickly.

They also know the policy shift leaves key questions unanswered, not least exactly what a Ukrainian victory would look like. And it carries potential risks. Mr. Putin could resort to chemical or even tactical nuclear weapons, or respond...