The campaign rules have been posted here on the forum.  They include all dates for the campaign, including the multiplayer games, plus downloads for both the campaign rules and attrition cards in pdf format.

The campaign will kick off on Wednesday 18th July with a multiplayer Prologue game; a chance to meet other players in the campaign, register your interest and arrange your first one-to-one game for the following week, plus gain a head start with extra supply cards and/or Renown points.