Welcome back Darkman. Biggest changes are definitely the naval rules, naval battles. Pay close attention on how many spaces naval units can move in different movement phases, as they are one prop(slow) ans 2 pros (fast) naval units.Also the order of play has changed dramatically, with raids being done after all the chit draws have been drawn. Minor ones are, a few map changes, a few new leaders, transports planes can only carry paras or mnt troops but not regular inf, John st at the top of my head.