I've done a little research and I'm in the process of determining which types of support will be available to the two sides. As usual with Chain of Command, the reinforcements are sorted into numbered lists. So for example a platoon with six points of support could pick three items from list one and one from list three or any similar combination.
First up are the Soviets:
I'm presenting these here so my fellow players have some idea of what toys they might usefully bring. The German list will follow shortly.
I'm reasonably confident of the appropriateness of all of these for Ukraine in February 1944 but if you know otherwise....