I beat chapter 6 of Fire Emblem. I figured I'd do better if I sent my troops further south (there's a fortress in the middle of the map, I didn't let them go north of it), which turned out to be correct. I also switched Garcia (an axeman) with Joshua (a swordsman with high dodging ability), which gave good results but possibly TOO good, as he ended up sucking up experience points which I would rather have spread around more.
Caution children! Happy ice cream dancing for you!