"If you first use the no ai cheat, and then use the switch code when talking with papacy, you can play for them (normally impossible) their special units are: Heavy Crossbowmen, Feudal Knights, Halberdiers, Teutonic Knights, Men-At-Arms" - Alekz

"One tip that will save your nation from a disastrous turn is to pay close attention to your Kingdom Power. When the diplomatic messages you receive from other countries ask you for help or to break alliances with nations you have arrangements with, do not be hasty to answer. Click to your Political View and search for the nation in question and see who they have alliances with by hitting the icon with two small bronze colored flags. This will display whom they have arrangements with and determine what your decision should be. A loss in kingdom power while you are embroiled in a conflict will hinder you immeasurably." - Ga'laagner

"After you choose which nation to play, first thing you should do is build defenses on your home land, start trading with the biggest nations and collect your special resources as soon as possible. With a strong home defense you can then work your way around the map without the worries of losing your home. Go for the small weak nations first. Starting a war right off the bat with a large nation can lead to a quick lose if you are not well armed!!" - Kit