The Emerald Isle

The classic first campaign, and still the best tutorial the game has. Murchad of Munster, 1066 (Rags to Riches bookmark): Ireland is a patchwork of independent one-county counts, so park your chancellor on fabricating claims and eat the island county by county - nobody can resist your starting stack. Hold the de jure counties, save up the gold and prestige, create the Kingdom of Ireland, and it pops. Moving up in the World comes along for the ride if you don't have it.