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Considering a timeline on this idea, so I wanted to make that at least the POD stands up.

That being said, what if Julius Caesar, after conquering Gaul simply decides to go east across the Rhine River instead of north?

The goal, like it was in Britannia, is to establish a Roman settlement(s) in Germania, killing local resistance as per necessary.

How plausible is this and what are the potential ramifications for Caesar politically if he is successful?

Off the back, I'm thinking that this ultimately proves to be a blunder for Caesar given the comparative strength of the Germanic tribes in relation to what he faced in Gaul, but I could be wrong.
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