ETA political-military (Spanish: ETA político-militar, Basque: ETA politiko-militarra) or ETA (pm) was a faction (actually the majority) of the Basque revolutionary armed organization ETA, who during Spain's transition to democracy proposed initially a double political and military type of work, by contrast to ETA militarra or ETA(m), who initially wanted to keep the struggle only in the military plane.
In the late 1970s, ETA(pm) divided into two groups, with the bulk of the militants siding with the so-called Berezis (the Special Cells). The Berezis merged shortly after with ETA(m), following that the resulting organization became the main branch of ETA and was called from then on ETA(m). Those who stuck to the positions of ETA(pm)'s leading team defended the submission of ETA's violent actions to their political party EIA's needs (founding party of Euskadiko Ezkerra), often economical urges. However, Spanish officials hard pressed on the newly formed party to immediately stop ETA(pm)'s actions or to face up to the consequences.
In the early 80s, the VII Assembly was held, which sought a way out of armed struggle. ETA(pm) - VII Assembly, through the mediation of a related political party Euskadiko Ezkerra (Basque Country's Left), accepted a policy of individual pardons to all members who publicly renounced violence. Many of its former members integrated into Euskadiko Ezkerra, which later fused with the Partido Socialista de Euskadi (PSE), the Basque affiliate of the national Spanish Socialist Workers' Party. A small group refused to join the VII Assembly and kept the armed activity under the name ETA - VIII Assembly, soon to merge with ETA(m) in 1983.
See ETA for more extensive discussion of ETA (pm) and the parallel ETA (m).
The original article can be found at ETA political-military and the edit history here.