Added preliminary changes to US units. The current thinking of the American faction is: powerful air units and fire support, moderately priced but replenish expensive infantry units in the event of loss, and repairing machinery is also an extremely resource-intensive project. (Because they came from a long distance and crossed the oceans)
Polania: Low health unit, but all units are fast and have a long range. They are good at using favorable terrain for long-range sniping.
Saxony: Expensive but powerful troops, relying on mutual support with mechas and powerful long-range artillery to advance gradually.
Soviet Russia: A cheap and large number of infantry units, good at using a large number of infantry to provide cover for mechas, and then use slow but powerful mechas to destroy the enemy at close range.
Usonia: The price of infantry units is normal, but when they are lost, more resources are needed to supplement them. Powerful air units can provide fire support.