Hey, the barbarian migrations of Europe could fit into an encyclopedia set let alone in just a few sentences. That was about as brief and concise of a synopsis of what happened that you are ever going to find find that short of a paragraph. No apologies.
Please go forth and pontificate on the subject if you have any objections.
No need to, I made an appropriate response of an appropriate length. Of course, that doesn't mean I *won't* do something longer... ;^)