As Congress dithers about funding aid to Ukraine, Ukrainian military capabilities decline. This decline is gradual. Previously committed weapons, munitions, and supplies will keep some equipment flowing for months or even years. However, the effects of declining aid will be increasingly apparent on the battlefield. Ukraine is no longer able to conduct a counteroffensive. By February or March, it will have difficulty conducting local counterattacks, and by early summer, it will struggle to fend off Russian attacks. At some point, the front will collapse, and Russia will impose a harsh peace. Q1: Why is military aid needed? A1: Militaries in...