Since Russia invaded Ukraine on February 24, the Ukrainians have put up a courageous stand. The sheer force of the Russian onslaught against Ukrainian villages and cities may still break the military front. But what has happened and continues to happen in Ukraine is a miracle on the Dniepr. In the 1920 “miracle on the Vistula,” Polish forces arrested the westward march of the Red Army; now Ukrainians are fighting to obstruct Russia’s push toward Europe. The Ukrainians, willing to die to keep their liberty, are now Europe’s rampart.