Rhaetia was conquered in 15 BC.

Rhaetia (Switzerland) was conquered in 15 BC

Peter Conradin von Planta has written:

'Das alte Raetien, staatlich und kultur-historisch' -- subject(s): History, Rhaetia

'Das alte Raetien' -- subject(s): Rhaeto-Romance/Romansh history and culture

'Das alte Raetien, Staatlich und kultur-historisch' -- subject(s): Rhaetia, History

A tourist from Ancient Britain wanted to travel to Ancient Rome would have walked (if poor) or traveled by cart via Gaul (France), Rhaetia (Switzerland), and northern and central Italy. Alternatively he could have sailed there.

Modern Switzerland covers an area where in antiquity there were two separate regions.

The Helvetii lived in one of these regions (most of the plateau of Switzerland. There is no record of when they were conquered. They fought to support the Gauls in the Battle of Alesia (the final defeat of the Gauls by Julius Caesar) in 52 BC. After this there was no mention of them until 68 AD. When Augustus created the Roman province of Germania in 28-23 BC the territory of the Helvetii were part of this province.

The other region was Rhaetia (central and eastern Switzerland and part of southern Germany and eastern Austria. Rhaetia was conquered in 15 BC.