Thanks for the repport, dude.
Bugs on 2013:
I supose after 1 year playing, you had conquered some countries, and remember that country consumes power, and if you have more power than you can produce, you can not train anything. If this thing happens again, it means you need to build more powerplants to earn more power (Check the "Food" usuage. Instead food, there is power)
Units Going Neutral:
That happens when all crew members of a vehicle dies. It mosty happens with APCs because its eassier to a crew member die inside an APC instead a Tank. Crew is mana, if a vehicle mana gets 0, it gets neutral. To control it again, pick a random soldier, and use "Interact" ability, to get inside the vehicle and pilot him.
Lag on South America:
Thats due the hi-poly trees. I'll remove them on next version, and look like you are not the only one wich got it. Thanks for repporting