[quote=The Nexerus]
How so?
[/quote]

Because Belgium was a sovereign state for thirty-years. It's been way too long. Hell, even if it hadn't been that long, Belgium was, at that point, a sovereign state.

I'm struggling to come up with some examples, but.. It'd be like Serbia suddenly deciding they should annex the rest of the Balkan states because they once, at some point in the past, owned them anyway. It wouldn't fly.