There was sure alot of noise on the posting over this? They don't need to revise the rules in red, it's right here on Page 5 of the learning to play rules.
Key Concepts:
Provinces and Strongholds
A player’s province cards represent a variety of circumstances and occurrences in the lands under the control of the Great Clans of Rokugan. During the game, players declare attacks against one another’s provinces, and successful attacks can result in a province breaking. If three of a player’s four non-stronghold provinces are broken, attacks may be declared against that player’s stronghold province. As soon as a player’s stronghold province is broken, that player loses the game.