Which territory was added to the Roman Empire under Caesar's governance?

A. Tarquinia

B. Venice

C. London

D. Gaul

The answer is D. Gaul, which is now known as modern France and Belgium. Julius Caesar's campaign over the Gallic territories began in 58 BC and after it was conquered Gaul became part of the Roman Empire.

The territory that was added to the Roman Empire during Caesar's rule was gaul.