I could have sworn I read something on these forms that the first advance to the Western Front is handled by the denouement of the first mission: you don’t roll Pressure or advance Time because you’ve already set their initial values as part of the end of the first mission, which included automatic advancement to the Western Front.
We did it this way as it is noted in the book, after the initial mission and forced advancement, that you “Continue with the other phases as normal.” (my emphasis). Which we took to mean the initial Time, Pressure, and Advancement are not handled as normal, instead set at the values resulting from the first mission’s outcome, and the remaining phases occur out of the normal order – since the choice to Advance normally occurs after the QM’s and SM’s phases, except during that first mission, since if the QM and SM don’t get their phases prior to advancement, they can’t reduce Pressure by spending horses.
I note now that it says under the Commander’s Initial set-up that the QM does act first. So we may have gotten this all completely wrong based on seemingly contradictory instructions. (The denouement for the initial mission and set-up for the command roles do not feel well out-lined and have created confusion in both the groups I’ve played in.)