I'm sure you remember that it was Julius Caesar, not Caesar Augustus, who invaded Gaul.
You didn't click the link, and so missed out on the backstory. Soliton, on an earlier thread, attempted to rebut a point I was making about Julius Caesar, but did so by appealing to some artefacts having to do with Caesar Augustus, thereby indicating that he didn't know that the two were not one and the same. And this, after Soliton had just told me that I needed to "learn some history" (which, when my wife heard about it, she laughed out loud).
I was simply taking the opportunity to needle Soliton.