From the announcement:
Battle Of The Bulge is a campaign expansion to Bolt Action & compatible with both 1st and 2nd editions. Crammed with scenarios, new units and new rules whilst still giving some historical background for context. Everything you need to explore one of the most complex series of engagements in the European Theatre of Operations is within the 124 pages of this full colour book.
The Battle Of The Bulge campaign book is divided into easy sections that take a brief look at a particular historical time frame, the combatants involved (including any special characters that made an appearance) – then moves on to introduce the special Bolt Action scenario, with any special rules or new units clearly explained, along with the recommended force selectors to use when preparing your forces.