That's like listing how long Texas or California were part of Spain/Mexico. It's true, as history, but it wouldn't make the US any happier if those lands went back to Mexico. Current facts on the ground say that those are part of the US, and have been for over a hundred years.
Nobody is asking France to return Alsace-Lorraine, but in a historical article, one might expect at least a footnote to say that this wasn't just French territory! And I don't think the comparison with Texas is all that fitting: this particular territorial dispute goes back almost to the days of Charlemagne, with sovereignty changing numerous times. This isn't so much a case of "It was yours, now it's mine" as of "It was mine, then it was yours, then mine again, then yours again - now we can't really say whose it ought to be, but I still want it".
My point was that, no matter how many times it went back and forth, it had been France for over a hundred years. That's "just French territory" for most reasonable purposes.
(Except this is Europe, where a hundred years is not a particularly long time...)
