Hello Duke of Earl,
About ''Mission'' chapter...
In scenarios that I posted, I use this opportunity to display text for each camp, as you can see for Taroutino for example.
This text is introduced in place of [Insert scenario A] ... and B, in the Scenari folder.
As stated in the booklet, this is a purely informational text.
It presents the context and purpose of the beginning of the battle.
It can always been accessed (before and after the beginning of the battle) via F7, then Mission.
Maybe one day JMM would give other possibilities for this ''Mission'' aspect.
Cordialement,
Théo