I am not entirely sure how these will actually be advanced, but the basic idea is that vehicles each have a "generation number" and that in order to increment that number you need a certain amount of actual combat data on the vehicle (or a much larger quantity of non-combat testing). In modern terms a Generation represents about 10 years of technological progress.
Advanced Generation provides a few advantages:
- The vehicle with the higher Generation automatically gets double-10s on damage rolls.
- A battle group of vehicles is denied its Size bonus to Soak against an attack from a vehicle two generations or more advanced over it.
The idea here is to let Solars potentially start a Gundam-style iteration battle where each side keeps trying to one-up the other by produce newer and better warstriders.
Additionally, none of the penalties apply to regular infantry combat, to provide something of an equalizer and to encourage a different style of combat from technologically backwards factions.