When it's said the Romans "conquered" that doesnt
mean pacified as a whole... Caesar conquered all
of Gaul, but was still dealing with ongoing skirmishes
and even major revolts....about 50% of Roman efforts
on the battlefield, we're dealing with such.
When Caesar was planning to embark on his ambitions
in the new lands of Britannia, he had to first deal with a
serious revolt across areas of Gaul, that was targeting
his legions quartered in Gaul for the winter ((at that time
military campaigns were mostly seasonal, but Caesar
was know to force march his legions through winter
snow to deal with belligerents if necessary )).
