USA
4k (2-4) 1op
When you deploy an infantry of 4k or more, add to your support line then draw another from your deck.
The current USA has a tendency to reduce it's card draw so this provides some extra. This unit represents towed artillery that moves with the infantry to provide fire support. The 4k cost limits removal options against it while incentivizing using infantry to obtain it.
Germany
2k (3-2) 3op
When this unit is attacked, gain damage immunity until the end of the turn and retreat it.
An artillery unit that can be a pain if you get it in the frontline. It's functionally immune to being destroyed by units while still dealing damage, but it can easily be shoved off the battlefield or removed with orders.