Oh man. I probably have too many. I've already circulated my .4% short of domination for 40 turns space race loss, so how about some others:
1. Warrior rush. I had no intentions of axe upgrades though. I sought to wipe out nearby civs with sheer #'s of warriors. I actually did destroy one that way...you only need about 12 warriors or so to take an enemy capital that has archers
. I then had my newly researched keshiks take on...knights and muskets. Hot damn.
2. With Korea at pleased, I marched through them to attack Egypt and brought them along for the ride. I successfully captured 2 cities, using korea as a buffer. Once that war ended, Korea saw that I didn't have enough troops despite my tech lead. Suddenly, Korea had practically won the game
.
3. Ever try an archer rush on Monarch? I have. It's cute. Really cute. I've tried it about 5 times, and the only time it worked was when I didn't plan it from the start, but actually expanded peacefully and then had a dual resourceless war against ragnar, who was not ready for 10 archers hitting 2 in 20% culture cities. Every other archer rush? Miserable failure. Archers with cover =/= axes, even with equal shield investment.
4. I trusted Cathy, even after repeated trade slappings. I've come to my senses since that backstab, and now <3 Izzy instead.
5. In one of my rookie games I somehow got it into my head that converting to confucianism would be good, even though I was the only civ running it. Oh yeah, I also didn't have much of an army.
6. I have yet to use a plane or nuke. This will be rectified in my next game, provided I hit modern times.