I took the manual down because while it explained tactics well, it had very few custom battles... yet. Right now we're in the midst of a map update. When that happens, the map coordinates will change dramatically, so there's not much sense in documenting a certain map coordinate (appearance mostly) and then having to redo it all.
Expect all of the kinds of battles that were listed in the poll... and then some. Presently most battles happen during sieges, but the most varied battles are ones in which the terrain causes challenges. Say for example that you get pushed back around Wales into the mountains, you have to fight your way out in one: it's the only way to get back home as there is one location that only has one exit.
Sometimes you're fighting in knee or chest deep water. Maybe you're fighting in total woods, and you can imagine trying that at night and on cavalry. The way the battles are configured, the battle won't be locked, which means you can vary all the parameters.
Sometimes the terrain is very unfair, and in real life, only a fool might fight there (or the most brilliant tactician). The first to arrive at a battlefield got to choose the terrain, but of course that didn't mean that either side would engage. Battles were enormously expensive, and the longer you delay in the field, the more supplies get used up, and the men get "fat and lazy" [from the movie Gladiator].
Once the map gets locked down, I can include some pictures here. I did that before from two angles from the attacker and defender perspective. Actually within custom battles you can set it such that both parties are attacking, which is a lot more fun, but generally not always great for the AI. You want to mix it up so the AI (or you) can ambush and that means defending some.
At 4 pics per battle and probably way more than twenty, that's a lot of pictures. You additionally get the chance to fight on every settlement site, which means playing London as a field battle or any kind of fortification too. The only thing I can't do is program the special Britannia forts in the custom battle menu. Too bad as that would be awesome.