Definition of the Iron Age.

[Titvs Statilivs Castvs]

Well gents, I am sure the classification works for most people, but I find it well, a bit shakey....
I doubt the world will end if continue to look at it from a technological standpoint, and others want to jiggle the criteria
for academic reasons. But, the iron age obviously, did not end with the invasion, just a term used by historians.

Just a sidenote; if a term like "iron age" is to be disputed, then "antiquity", "middle ages" and "modern times" are also under fire, these being just a classification by renaissance scholars (and even "renaissance" itself, because there were also renaissances in the 9th century and in the 12th century).
That's just the problem with history, nothing went so easily, people didn't or did hardly notice when a new period began, so it's all just artificial. May be, once, there will come new classifications, but up to that point, I suggest you (and we all) use the current terminology, by the way it is generally accepted. D