Hi bretwalda

I'm with Ironside on this. I've been on RTW for a while now but remember a few things about MTW still. Iron boosts attack values so use on your swordsmen, knights etc who are offensive. Your spearmen need better defensive values and armour and will not be used on the offensive too often. Likewise you missile units may only need armour as they will not be involved in hand-to-hand fighting. This is a general rule as some missile and spear units can be considered offensive and thereby qualify for iron weapon upgrades.