First of all we would flood the media with a wave of propaganda to ensure that we all knew these living dead chaps were thoroughly bad eggs and just have to be bloody stopped, what!
Secondly we would have a recruitment drive and compulsory National Service for all the unemployed and poor oiks, equip them poorly, with minimal training and send them into battle with ridiculous rules they have to adhere to.
Thirdly the Banks would offer massive loans to both sides, as this is just good business.
Finally, millions would die, the elite would be rolling in dosh, the poor would be poorer and every ten years we'd have someone blow a trumpet and lay a few flowers somewhere.