I've got plenty of boneheaded mistakes in my past that I can only imagine made my games a lot harder than they needed to be, and I'm wondering if anybody else might like to share their own. To start things off: 1) I used to think that I needed to put mines on Gold in order to get access (this misunderstanding, I figured out pretty quickly). 2) Having been a committed YuGiOh addict, I used to think that the attack and defense stats in this game worked the same way: that Fortified meant "in Defense Position," that not Fortified meant "in Attack Position," and that if I, say, sent a Greek Hoplite into the wilderness, popped a goody hut, and was attacked by Barbarians, then my unit would only have 1 Attack because I wouldn't have time to "put it in Defense Position. As such, I didn't recognize the value of combined-arms stacks (Archers/Spearmen, Longbowmen/Musketmen), and I thought that certain units were better or worse than they really were: I thought that the Japanese Samurai's defense boost over the standard Knight was a waste because "why not just leave it in Attack mode?" and I thought that the Byzantine Dromon always had 2 against an enemy Galley's 1 as long as I didn't "put the Dromon in Defense mode" It took me an incredibly long time to figure out that the combat engine didn't work this way 3) I never realized how important Rapid Early Expansion was until I started watching "Lets Play"s on Youtube (this was long after I'd stopped playing, and I still haven't gotten back into it yet), and I always liked turning a small-to-medium number of cities into Cultural powerhouses... ... but towards the end, my favorite to play as was always the Mayans Since getting back into studying the game (though not quite back into playing yet), I've learned that you do not get a Civilization more carefully tailored to dominate at Rapid Early Expansion than the Mayans, and I always forced them to do the opposite. ... Anybody else done any of these? Done anything else that's not quite as bad? Done anything that was a lot worse?