Rylot said:
I picked up Medieval II on steam recently on a whim and while I've been enjoying parts of it there's somethings I can't seem to figure out...
*Always* mop up after a battle is won. Every single time. If you're able to juggle and can spare the units, it can be worth mopping up
during a battle. Units can, if their morale recovers, stop routing and return to the fight. This never happens if there's one of your units near and attacking it, and never happens after the 'would you like to end the battle?' message.
Generally the best method is to use cavalry or light infantry, in a roughly square or rectangular formation, to mop up the enemy, one unit per enemy to reduce the risk of them getting surrounded and fighting to the death. Turn Inf and Cav missile fire off if you've got lots of units colliding with each other while in pursuit.
Mopping-up deprives the enemy of their men, or enables you to ransom them for a fairly heft sum of money. And even if the enemy faction don't ransom then they have to spend money recruiting replacements.
Focus on General units - the general himself is worth loads, and even the generic soldiers in elite units ransom for more than peasants. It can be worth recruiting a unit or two of the lightest, fastest, cavalry available (usually missile Cav, failing that use scouts or raiders of some kind) into each stack, and keeping it rested and protected behind your lines, specifically for catching tired, routing cavalry forces and generals.
If you get good at battles you can basically fund your entire campaign through ransom and the sacking of cities and towns. Indeed certain factions are designed towards this playstyle (barbarian factions in Rome, nomadic factions in Barbarian Invasion, certain eastern factions in Medieval, and the Teutonic Knights in Kingdoms).
---------------------------
In terms of trade I wouldn't worry about advanced roads to start with. They increase trade but also allow increased movement speed - for enemies as well as your forces. So just go for the first tier or two in the heartland of your empire and along primary traderoutes as denoted by the carts and ships. Get plenty of trade agreements early on with potential allies and people you don't want to invade - it slightly improves your diplomatic relations with them over time. If Christian, getting a trade agreement with the Papal States early on (even if you have to pay for it) can be useful because stable diplomatic relations with them can be tricky.
Markets, ports, and public order buildings in cities are the way to go - so you increase income and are able to increase taxes when your public order improves. Hold off on castle upgrades early on - you can easily make do with militia forces in the early game and castles are expensive. (Edit: Exception - if you're playing as the pagans in the Teutonic Campaign, or as an otherwise disadvantaged faction with powerful, aggresive neighbours, an early fortification and military buildup can be more vital than early economic supremacy)
---------------------------------
Missile troops are divided into two types, armour-piercing and not. Non armour-piercing missile troops are crap against anything other than the lightest infantry, cavalry, and other missile troops.
Armour piercing ones bypass the armour stat of a unit and are
devastating, even if they have reduced stats and reload time. Crossbows and longbowmen tend to be armour piercing.
----------------------------
Autoresolve isn't bad, especially in sieges, but tends to be conservative. The enemy will often get away partially intact and you can often take less casualties and take more prisoners my fighting it yourself. You have a better chance of a total victory and taking the enemy stack off the map if you fight it yourself and mop up.
----------------------------
It can also be worth changing low-level castles into towns. The default map contains more castles than you really need - you can get by with one high level fortress in your heartland for recruiting elite level units, and then a few on your frontiers for actual defence and lower level professional recruitment.