It was established in Stockholm in June 2010,[1] after the wedding of Swedish Crown Princess Victoria and Daniel Westling.

[2] Each member organisation will retain their autonomous national campaigns however, in recognition of their particular political and constitutional circumstances.

AERM has member organisations in six of these: Denmark, the Netherlands, Norway, Spain, Sweden, and the United Kingdom.

[1] The AERM protested against the wedding of British Prince William and Catherine Middleton on 29 April 2011 in London, and planned to meet each year thereafter.

A video report on its Twitter channel about the arrest of protest organisers gathered millions of views and the interest of international media.