In recent days, many Western observers of the war in Ukraine have begun to worry that the tide is turning in Russia’s favor. Massive artillery fire is yielding incremental Russian gains in eastern Ukraine’s Donbas region, and Russia is bringing in new forces. Ukrainian troops are drained and exhausted. Russia is trying to create a fait accompli and to make reality conform to its imperial ambitions through “passportization”—the quick provision of Russian passports to Ukrainian citizens in Russian-occupied areas—and the forced introduction of Russian administrative structures in Ukrainian territory. The Kremlin likely intends to occupy eastern and southern Ukraine indefinitely...