Without too much military innovation at that time the army list is well suited to fight all kinds of Romans and Roman's adversaries. The Germans have a relatively high contingent of better (for Barbarians that is) Infantry and can have quite some cavalry. Also the use of archers sets them apart form other Barbarians.
*1 - Warbands are less well organized and trained than regular units. Especially strong is the effect of numbers and success and casualties on the units morale.
If all units of a brigade are classified as Warband and the brigade consists of at least 3 units, the brigades command value is increased by 1. Remember: a command roll of 11 or 12 is always a failed test.
If a Warband has to roll for drive backs without loosing a stand, the unit rolls 1 dice less than usual. If a Warband has to roll for drive backs after loosing at least one stand, the unit has to roll 1 dice more than usual.
Each stand of a Warband gets +2 attacks instead of the usual +1 when the Warband pursues. Each stand of a Warband looses 1 attack when the Warband fights an pursuing enemy (i.e. the Warband retreated).
*2 - The unit has a firing arc of 360 degrees.
*3 - Skirmishers are used to harass the enemy with missile fire, but stay out of close combat.
Skirmishers are allowed to shoot before they move. They can shoot even before they move on initiative. When they shoot before they move they can not shoot in the shooting phase. The drive back is still resolved at the end of the ordinary shooting phase. When a unit that has been shot at by skirmishers is charged, it will not be driven back, but has still to roll the appropriate number of dices to see if it is confused.
*4 - The unit has a reduced range of 15cm, because of short ranged weapons.