In my current game, I'm a bit further in tech than the other nations and have access to Warlord Captains since many turns now. The other civs are slowly catching up and have access to regular units of a comparable tech level now, but only one other civ is fielding Warlord Captains currently, and they're no match for my own highly experienced high-level Warlord Captains. Not to mention the regular units... even those which are a few techs more advanced (ancient hand cannons, for example) and cultural special units have no chance against Warlord Captains. I think the Warlords are severely overpowered units considering what they're capable of: they are able to get the Leadership and Heroic promotions, just like units that have been joined by a Great General. And yet, they have a much higher strength value than any regular unit available at the tech level. Warlord Captains have a strength of 15... the strongest regular units I have right now, and I have advanced quite a bit in tech since the WCs became available, are mailed knights with a strength of 14. And those are several techs in front of the WCs! Regular units, including cultural special units, just don't stand a chance against the Warlord leader units. I had a similar situation in a previous game where I was the least advanced civ, but it didn't really matter as I had access to Warlord Chiefs and so did almost everyone else - and most armies of all the civs consisted mainly of Warlord Chiefs, because they were the strongest unit available. This, combined with the ability to attack neutral civs without declaring war, makes them really, really overpowered. In my current game, I've had three Warlord Captains attack units in neutral lands for many, many turns now, and they've all leveled up beyond level 10 and have become ridiculously strong. They are enabled with the heraldry tech, and now I've already got chivalry researched and I'm currently researching gunpowder, but I still don't have any regular units that can beat unlevelled Walrlord Captains one on one... I think they should definitely be nerfed. They are way too strong - the strongest unit in the game for a long time, it takes many techs to reach regular units that can match them and then it's not long until the next Warlord upgrade becomes available. The only units that can match them are hero units, and even some of these only manage it due to superior promotions - Warlords surpass even some of the heroes in raw strength. And any regular unit of the same tech level joined by a Great General, too.