Comment by whoisjuan

I don’t know exactly what OP is referring to, but the Basque country in Spain is a region with certain separatist political actors that advocate/push for the independence of the Basque Country.

In the past this included ETA which was a separatist terrorist group from the Basque region. https://en.m.wikipedia.org/wiki/ETA_(separatist_group)

ETA was most definitely a terrorist group, infamously known worldwide for their use of car bombs.