Well its just a game so anything could happen but I don't get why some things appear the way they are. For example, why is only oil needed to make bombers and not iron along with it? Same with tanks. Why is rubber so important to making infantry with 2 points higher offense than rifleman and 4 points higher in defense? Wouldn't oil be necessary to make infantry because petroleum is used to synthesize kevlar bulletproof vests?? Riflemen require no resources, so the riflemen must use compressed air or something lol? That one I think I can let go though since more powerful explosives were chemically synthesized after the advent of blackpowder. However, the entire oil and rubber dealy doesn't hit the bull's eye. Oh well its a game after all and for heck they could have made the tabacco "food resource"??? a luxury that gives 5 happy citizens to all cities.