[SuperNinKenDo]

That's a really good point, although I think the smallness matters more in absolute terms, than relative terms. Both examples show that you can maintain a large foreign presence in your military though. The French Foreign Legion is highly, highly, selective though.

I don't know much about the Ukraine foreign legion, but being in an immediately existentially threatening conflict is a special case. I doubt the Ukrainians would wish for such a large foreign legion if they had the choice, although again, I don't know the history of its numbers prior to the war with Russia.