[7] In an interview to RUIS, obtained by the alternative portal Apatris.info in October 2015, a member of the group explains that the Revolutionary Union for Internationalist Solidarity "is an organization that fights for the world social revolution."

"[8] On 3 April 2017, the group reappeared on social networks on the occasion of a campaign of solidarity with the anarchist movement of Athens, launched through Twitter by the International Revolutionary People's Guerrilla Forces (IRPGF).

This caught the attention of some Greek media, sending their messages even to State security and intelligence services which affirmed to the press their concerns about the return of the fighters to the country.

[9][10][11][12] In February 2018, Icelandic RUIS and MLKP fighter Haukur Hilmarsson was killed in combat while fighting against the Turkish military operation in Afrin.

[4] The group is based on the ideals of anarcho-communism,[13] also called libertarian communism, a philosophical and economic major trend within anarchism whose main exponents were Carlo Cafiero, Piotr Kropotkin, Errico Malatesta and Nestor Makhno among others.