US marines is a strange unit, maybe it has too much siege but I can see that its somewhat balanced by the fact that it is not trainable ( well not easily anyway).
But the thing I am most conflicted about is whether for an unit that has such impact, defending from a marine timing it gives very little benefit since they give no XP. That too me seems like a bit too much of an advantage. It does require 2 cards in age 3 for it to be a good timing but idk, maybe its a big enough investment that losing it is hard to recover from, but it does feel a bit low investment to me to have that much siege so quickly.
Thoughts?