Celtic levies

[Frostwulf]

There is no reason to presume that levies were better trained in the early times and later not so.

I agree with this statement.

Overtime the military tradition among the average Gaul decreased as the nobles and other leading men consolidated this for themselves and their own retinue of vassals, or 'slaves'.

I might be misunderstanding what your saying here, but I agree with what geala said. The farmers/craftsmen etc. would be no different from 3rd century B.C. till 50 B.C., they still had the same martial spirit and attitude. The only exception was as you pointed out the migration time, and "perhaps some longer term exposure to some battles in the late 200's B.C. and the early 200's till the late 190's. But again the only advantage would be from experience(the little that there would have been), not from training.

A vicious never ending cycle of warfare that escalated among the Aeduoi and Aruernoi.

Cattle raids, small score of men fighting it out and as you pointed out:

Celtic champions and nobles on each side would duel among themselves, with their retinue cheering them on. Should one side get the worse of it all, then the opposing retinues could be overcome by their rage and join in the fight if the druids or other judges (like referees) could not control them.

Sometimes things would get out of hand.
Everything else you wrote I agree with. It seems to me your doing a very good job on the factions, keep it up.