Yes global wars, sometimes a side wins, sometimes they just agree to stop.
Well prices on warres.(Steel, Alu, gas and muni) goes anywhere from 100% to 250% up as supply is suddenly limited and the demand is high. but aslong as GPA exists there are always going to be atleast one major alliance sitting out and supplying, so theres a shortage not a complete stop.
Also we clearly dint get a global war rn, just a minor stomp of Alpha.