What were your first moves when starting with England,
personally i built up a small army and attacked york, then sent a diplomat to get the french princess to marry my heir, then i sent a diplomat to scotland to marry cecilia to the scottish heir, then built up a strong navy and stomped the rebel navys destroying trade.

Next i built an army and sieged Caernervorn, until the last turn where they attacked me, the welsh longbows were attacked by heavy cavalry and routed immediately, then spears from my frontline charged their spears, and my mailed knights flanked them and sent them routing, and then the battle was a series of slaughter and... well... more slaughter.

Then i built up an army and defended at the siege of Caen, then led a series of raids on french ports and now i am where i am now
This happened in a period of 15 turns.