Quote Originally Posted by Colovion
If the enemy army loses generally the losers will run away, leaving their baggage train behind them for the victors to loot.

Variables would include, but are not limited to:

-wealth of the nation fielding the army
-amount composing the army
-any traits relating to luxury (Spartan would yield less loot)
-amount of army loot (described below)
-amount of time in the field

army loot - would depict the army looting the enemy. The longer the army is in the field, the more loot would be diminished from the army's loot. It would be available to be sent back to the Homelands. The easiest way to do this would be to Load the Unit with the amount of loot you want to send back - and then hope that they don't get attacked along the way. The army that holds more loot would also be, inherently, more loyal. Sending loot back to their families/Homelands would give 2/3 the amout of loyalty that simply holding it for themselves would give 100%.
Not armour, and that would be the most expensive part of equipping an army.