Complex sentence: It was inhabited in that time by the Eburones, a Belgic tribe based of north-eastern Gaul in the 1st century BC. Julius Caesar described them as being of Germanic origin.
Split into simpler sentences: It was inhabited in that time by the Eburones. The Eburones were a Belgic tribe based of north-eastern Gaul in the 1st century BC. Julius Caesar describes them as being of Germanic origin.