In the early 1980’s there was a spectacular wave of interesting Belgian bands. This was not obvious to me at the time, as I (born on the mid 60’s) was just discovering music, so I figured this abundance was the default situation. Only in retrospect did I realize how exceptional the era was.
Such a bold statement of course begs for some proof to back it up, so here’s a very nice example: Allez Allez (which happens to be both the name of the band and the song).