From their website:
Days of Ice and Fire is quickly approaching. Among the activities planned for the weekend are several exciting events for Battles of Westeros. While many players already have several skirmishes under their belt, some have yet to delve into this newest addition to FFG’s A Song of Ice and Fire themed games.
This article is a brief overview for players who have yet to experience Battles of Westeros. What follows are a few major aspects of the game that will give you an idea of what it’s like leading your great House into war. For more in-depth information on Battles of Westeros, be sure to visit the product website.