If I recall correctly, you had to be rich to enter the legion because you had to buy and maintain your equipment on your own, which was very costly.
Not sure where you got that from. It's possible but it'd be the first I've ever heard of it.
Yeah, we date the beginning of the middle age to the fall of the Western Roman Empire (476). But you have to admit it is fairly Euro-centric.
Yes, but how can it be anything but Euro-centric? Rome was Europe, and it's not like the world was any bigger than Europe at the time.
And yeah, I knew it wasn't considered midieval, I just didn't know the name of what came before that.
"Medieval"
and depending on whether or not you see the entire pre-Middle Ages as "Ancient" or make the division between "Ancient" and "Classical", the time of the Western Roman Empire was Ancient or Classical, but "Ancient Age" is the official name for the time.
Roughly it's like this:
Pre-history (until 3000BC) - Ancient Era (3000BC - 476 AD) - Medieval Era (476 AD - 1453 AD) - Renaissance (1453 AD - 1789 AD) - Industrial Age (1789 AD - 1914 AD) - Modern Age (1914 AD - present).
The Ancient Age began with the (estimated) advent of the Egyptian Empire, the Medieval Era began with the "fall"* of the Western Roman Empire, the Renaissance began with the capture of Constantinople and the fall of the Eastern Roman Empire, the Industrial Age began with the storming of the Bastille (i.e. the French Revolution), and the Modern Age began with World War I. These are all agreed-upon time points although of course history changes slowly and not just with one turning point.
Some people insist on dividing the Ancient Era into the Ancient and Classical periods, and the Medieval Era into the Dark Ages and Late Middle Ages, and there are loads of pseudo-historians who are just dying to coin terms for all kinds of periods in the Modern Age (Interbellum, Recent Age, Information Age, etc), but the above division is the "official" one.
* The Western Roman Empire didn't
fall as such, it wasn't a bloody, fiery war or anything, but due to unchecked immigration and failing of central authorities, the WRE simply gradually stopped being an entity. 476 AD is the year when the last Roman Emperor, Romulus Augustulus, was deposed by the Germans at the age of 16.