When Did the Viking Age Start in Francia?

In britain, the traditional is that lindes farn off the coast northumbria, is attacked seven 93. In francia, what's traditionally considered to be the first viking attack took place in seven 99. There are some indications that small scale viking activity was already much more common along t frankish coast during these early decades. So i'm a bit sceptical about putting an actual specific date on the of the viking age in francia, but i would lean towards it developing gradually from the mid eighth century and shortly thereafter.