So I rated this pretty highly. Concept is original, rules are fairly clear, and its very growth themed. Well done!
I do think there is a death spiral present, since whoever wins the first few battles, gets a massive advantage in numbers. But that's there for both sides though, so its more likely to decide the games results in the first turn then give any one side an advantage from the start.
It also hugely disadvantages hoard armies since every unit starts with 3.