Wars often have unintended consequences and should never be undertaken lightly or without carful thought and planning, you had better have a very good reason for going to war, especially in today's world and make sure you have the backing of the population. Vlad never imagined he would be fighting for his own life less than 2 years after the blunder of his invasion. He will be remembered as Vlad the idiot, the one who destroyed the Russian economy and the futures of a generation, who set the country back decades and greatly weakened the nation, perhaps leading to its dissolution.
I think when Joe saw his chance to squash the cockroach, he approved a strategic plan to do so, just by slowing arms deliveries to the Ukrainians and pacing the war while rallying the allies to deliver arms at the decisive moment and that moment has arrived.