The Romans continue their siege of Avaricum with the strategy of scorched earth by Vercingetorix causing problems, but the Romans building a counter mound adds pressure, and emotional stakes are involved as women and children are caught in the middle during an attempt to escape by the men in the garrison.
The Gauls calmly and logically planned for an organized assault on the Roman defenses of Alesia, which made the battle even more terrifying for the Romans. A near-run thing, the Romans defeated the Gauls though the prolonged contact with the Romans made the Gauls stronger and more dangerous in the long run.
Historian Mike Duncan talks about the logistical challenges the Belgians faced during their revolution and how Julius Caesar was able to take advantage of the large, decentralized barbarian armies using his more centralized Roman logistical infrastructure in the Gallic Wars.
The Volscian army threatened Rome in the early fifth century BC, a disgruntled Roman general named Corleonus led them through the legions and right to the gates of the city. The peak of the Volscian threat came early, around 491 BC and by the mid-480s BC, the threat had largely been contained.
This podcast talks about the Battle of the Teutoburg Forest where Rome experienced a major loss in battle against the armies of Germanic tribes due to the advantage of having taller fighters who were proportionally stronger.
Caesar orders the burning of all towns during his conquest of Gaul, except those considered to be impregnable. The siege of Avaricum was an exception, due to its strategic location and the emotional attachment of the people to their city.