"Be the Aragonese in the middle age. Often enough, the Spanairds have very few heirs in the middle age. Stay allied to them. Eventually,(After 6-10 turns) if they are still fighting the Almohads in the south, the king will die. The states of Spain will go into anarchy. While the Spainards were fighting, keep a army of Jinnettes. The Almohads will be weak, so overrun Spain. If you choose this faction, do ont command any attack. Their generals are weak. With the Aragonese, I managed to take the Almohads, Egypt, Spain, Turkey, France and the English Isles. The Aragonese rule! " - Aragonese Champ

"if you can, invade the east - north turkey east byzantine- they have the best cavalry really quick so leave them to develop for a while then use them to crush armies who dont have nearly as good troops

also

if a country launches a crusade into your lands and you have moneey and some land, DONT TAKE NO S**T FROM THEM!!! frans recently did this to me and i used to have about 20 provinces in the south NOW I CONTROL MOST OF EUROPE!!!

PS make sure that when you start you make all of your provinces 20% farming befor doing anything else, do the same with newly captured provinces- this will help you with finances

PPS in peacfull spells im prove your farming up to 80%

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#TIP 2#

when sending an army to other side of your kingdomfigure out how many years it will take to get there then build troops accordingly, you will then have a large army as quick as is possible

e.g. if your prince is five provinces away from the action dont build anything in his province, 1 set of troops in the next, 2 sets of troops in the next, etc. etc.

collect the troops as you move to the fight so that by the time you get there you have a large army without waiting-i use this myself alot" - alhomad king