In a typical wargame special case rules are numerous, but mostly expected and conforming to familiar design patterns (e.g. entering a map hexagon containing something special with a unit, depending on unit type and state, is going to cost some extra point of movement or end the move completely). So they and can be looked up when needed (e.g. what units can move enough to cross this river this turn?) and promptly forgotten. It is usually enough to study wargame rulebooks just enough to know general procedures and trust the simulation to be unsurprisingly realistic.