. ▁Using ▁state ▁terror ism , ▁the ▁G AL ▁carried ▁out ▁do z ens ▁of ▁attacks ▁around ▁the ▁Bas que ▁Country , ▁killing ▁ 2 7 ▁people . ▁It ▁target ed ▁E TA ▁and ▁Her ri ▁Bat as una ▁members , ▁although ▁sometimes ▁civ ili ans ▁were ▁also ▁killed . ▁The ▁G AL ▁were ▁active ▁from ▁ 1 9 8 3 ▁until ▁ 1 9 8 7 , ▁a ▁period ▁referred ▁to ▁as ▁the ▁Spanish ▁D irty ▁War . ▁E TA ▁respond ed ▁to ▁the ▁dirty ▁war ▁by ▁intens ifying ▁its ▁attacks : ▁the ▁organis ations ▁started ▁carrying ▁out ▁massive ▁car ▁bomb ▁attacks ▁in ▁Madrid ▁and ▁Barcelona , ▁such ▁as ▁the ▁Hi per cor ▁bomb ing , ▁which ▁killed ▁ 2 1 ▁civ ili ans . ▁After ▁the ▁attack , ▁most ▁of ▁the ▁Spanish ▁and ▁Bas que ▁political ▁parties ▁signed ▁many ▁p act s ▁against ▁E TA , ▁such ▁as ▁the ▁Madrid ▁p act ▁or ▁the ▁A j uria - E nea ▁p act . ▁It ▁was ▁during ▁this ▁time ▁that ▁Her ri ▁Bat as una ▁got ▁its ▁best ▁results : ▁it ▁was ▁the ▁most ▁voted ▁party ▁in ▁the ▁Bas que ▁autonom ous ▁community ▁for ▁the ▁European ▁Parliament ▁elections . ▁ ▁While ▁tal ks ▁between ▁the ▁Spanish ▁government ▁and ▁E TA ▁had ▁already ▁taken ▁place ▁in ▁the ▁late ▁ 1 9 7 0 s ▁and ▁early ▁ 1 9 8 0 s , ▁which ▁had ▁led ▁to ▁the ▁dissol ution ▁of ▁E TA ▁( pm ), ▁it ▁was ▁not ▁until ▁ 1 9