I have been playing for a while and have found that three things impede my progress. One, that when alone in a field the fact that you cannot transport light tanks in regular transport s. Two, that you cannot get regular transports until lvl 7. Three, that upgrading the individual units boost at lvl 3 and 5 of the barracks take two much steel and that it takes a full day to recover steel sufficiently. So any thoughts on this would be appreciated.