O.K. this is inspired by the entire Pikemen-upgrade-to-Lancers thing. First off: Lancers are good units and I see the underlying reasoning of upgrading an anti-cavalry specialist to an anti-cavalry specialist but I do have issues with the upgrade path. This is how I think it might be preferable: Spearmen => Pikemen => Gatling Gun => Machine Gun => Mechanized Infantry My line of reason sees Pikemen as more of defensive specialist that doesn't require a strategic resource than strictly an anti-cavalry specialist hence them upgrading to Gatling Gun. Admittedly this causes them go an entire era without an upgrade. Also: requiring the Gatling Guns and Machine Guns to set-up somewhat like artillery could also be added. Sorry, no more range 2 or terrain ignoring Gatling/Machine Guns. Lancers => Tank Destroyers => Helicopter Gunship Yes, Lancers actually start out this line (maybe given even a further boost because of it). Anti-Tank Guns are still there in the same place in the tech tree for civs without (or out of) oil and eventually upgrade to Mechanized Infantry. Tank Destroyers (new unit): Same place in the tech tree as Anti-Tank Guns and cost a bit more hammers, requires oil, keeps the cavalry's 33 penalty for city attack, has a movement of 5, really good at attacking tanks but trying to take on entrench infantry of similar tech level will get them quickly destroyed. On the issue of the look of the tank destroyers they should probably have an open top with a visible crew so it's not mistaken for tanks. Basically: Anti-cavalry fast attacker => Anti-armor fast(er) attacker => Anti-armor fast(er)(er) attacker Archers => Composite Bowmen => Crossbowmen => Congreve Rocket Men => Mortar Men => Mechanized Infantry Congreve Rocket Men (new unit): Maybe just Rocket Men so it's more generic. Needs to come after Musketmen and before Riflemen so Chemistry could be a good place for it but upgrading your siege weapon line and archer line with the same tech might be a bit much. This unit would have the same roll as the units in the line that came before it. Mortar Men (new unit): Great War to Vietnam (and a bit post) era mortar squads. Replaceable Parts, Plastics, and Ballistics are good candidates for this unit's place in the tech tree. This unit would have the same roll as the units in the line that came before it. So what do you think the upgrade paths for units should be (diffrent, the same)?