What happened in the Roman Conquest of Gaul

The wars culminated in the decisive Battle of Alesia in 52 BC, in which a complete Roman victory resulted in the expansion of the Roman Republic over the whole of Gaul.  In 56 BC, Caesar defeated the Veneti in a naval battle and took most of northwest Gaul.

Explanation:

Conquering Gaul allowed Rome to secure the natural border of the Rhine river

Explanation:

Conquering Gaul allowed Rome to secure the natural border of the Rhine river. The wars began with conflict over the migration of the Helvetii in 58 BC, which drew in neighboring tribes and the Germanic Suebi.

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