As many others have said, they will likely send most of those troops north for further operations in the Donbas, the grand hope being to encircle and trap the majority of the Ukrainian army. But for several reasons, it's not clear to me whether the forces from Mariupol are enough to finish the job on the eastern front. First, we don’t know how many Russian troops will actually be sent up north. If it's like 15,000 or 20,000, that could prove to be decisive. But if it's like 5,000, I doubt that would be enough for an envelopment on such a large geographical theater. Second, the Russians are making slow and steady progress in the east, but there has still been no decisive breakthrough in Izium and Severodonetsk. These need to fall soon if the Russians don't want to get bogged down. Another important unknown is just when exactly Mariupol will fall. Its defenders have already hurt the Russian war effort substantially by holding out for so long. The longer it takes for Mariupol to fall, the better things look for the Ukrainians.So anyone want to guess what the Russians are gonna do next after Mariupol?