When AMI left Nós-Unidade Popular the organization underwent a split of those that supported to remain in Nós-UP, which adopted the name BRIGA.
Ideologically the organization has positions close to libertarian socialism and communalism (which contrasts with the more orthodox Marxism of its origins).
The group has also opposed to speculation, the touristification of Galicia, to public works that damage the environment and military service (until it disappeared in 2002).
In 1995 two militants of AMI (Adolfo Martim Naia Fernández and Armando Jesus Rivadulha Peres) were accused of planting an explosive in a bank in the city of A Coruña.
The 24 July 2005, on the eve of the Day of the Galician Fatherland, two members of AMI were arrested accused of placing an explosive device of considerable power in the main headquarters of Caixa Galicia in Santiago de Compostela.