Basque separatist group ETA formed in 1959 began violent campaign in 2005 . Most recent cease - fire collapsed in 2007 despite claims of success . Group blamed for more than 200 deaths , including many civilians .
Basque separatist group ETA formed in 1959 began violent campaign in 1968 . Most recent cease-fire collapsed in 2007 despite pledges of permanence . Group blamed for more than 800 deaths , including many civilians .