There is quite a mixture. Pillkallen is a fictional cavalry vs cavalry scenario, as if the German cavalry had stood firm on the left flank of Stallupönen. Degesen and Pötschlauken feature the two flanks of the German defence north and east of Stallupönen.
For Gumbinnen, there are the northern (Mallwischken) and southern (Gawaiten) actions, along with a mixture of actions in-between. These include engagement battles and the Russians occupying light entrenchments.
Tannenberg is also a mix. Generally, the Russians were on the defensive but there is one scenario (Defence of Unger's Force) which has the Germans defending, plus some encounter battles.
Several scenarios are designed for the tables to be joined up if several people want to participate.
Robert