Question: In pre-Roman Gaul the Belgic tribe of the Veliocasses or Velocasses controlled a large area in the lower Seine valley, which retains a trace of their name, as the Vexin, in 52 they raised 3000 men to support which son of Celtillus the Avernian, leader of the Gallic tribes?
Sentence (from "Veliocasses"): According to Julius Caesar' "Commentary on the Gallic Wars" the Veliocasses participated in the tribal coalition of the Belgae that resisted the Romans in 57 BCE.
Relevant evidence: No