As the second anniversary of Russia's unprovoked invasion approaches, the situation is beginning to look bleak for Ukraine.Last year's counteroffensive brought hopes that Ukraine could capitalize on its successes in 2022 and drive back Russian forces from occupied territories in southern and eastern Ukraine.But the offensive failed to achieve a breakthrough, and Ukraine is now seeing crucial support from its allies bleed away. Meanwhile, its troops are experiencing shortages of personnel and ammunition.There are problems at the top, too. Its senior command has been engulfed in chaos, with Ukrainian President Volodymyr Zelenskyy replacing Valery Zaluzhny, a senior commander, amid reported...