The delivery of tanks, advanced air defense systems and potentially long-range ground-launched bombs may be a response to Ukraine’s dire requests, but it also brings with it a new load of problems. These hastily and urgently provided supplies indicate that all is not well in Kiev and that it is closer than ever to losing the war with Russia. These are not one-to-one replacements for equipment lost: Most of the delivered supplies aim to shift the fortunes of the war in favor of Ukraine. At least one of the projected weapons, a 100-mile ground-launched long-range bomb known as ATACMS, also...