Commentarii de Bello Gallico, also Bellum Gallicum, is Julius Caesar's firsthand account of the Gallic Wars, written as a third-person narrative. In it Caesar describes the battles and intrigues that took place in the nine years he spent fighting the Celtic and Germanic peoples in Gaul that opposed Roman conquest.

Diviciacus or Divitiacus was a druid of the Aedui tribe who lived in Gaul during the 1st century BC. He is the only druid from antiquity whose existence is attested by name. The name may mean "avenger". His date of birth is unknown, though he was an adult during the late 60s BC, and an aristocrat who took part in the clans' decision-making, as described by Julius Caesar in Caesar's The Gallic War.