Original sentence: Alesia was the capital of the Mandubii, one of the Gaulish tribes allied with the mighty Aedui, and after Julius Caesar's conquest a Roman town (Oppidum) in Gaul
Edited sentence: Alesia was the capital of the Mandubii, one of the Gaulish tribes allied with the mighty Aedui, and after Julius Caesar's conquest a Roman town (oppidum) in Gaul