assembly of the western european union weu of the assembly of the western european union which was founded in in addition to the weu s ten member states they include associate members k cached similar pages guide to the amsterdam treaty and implemented at the eu s request by the western european union weu any decision requires the positive votes of at least ten member states k cached similar pages documento sin t tulo were invited to join the western european union weu established by belgium the weu including ten member states which signed the brussels treaty k cached similar pages the nato russia archive new european security architecture the western european union weu was first established as a mutual assistance of its ten member states all of which are both nato and eu members k cached similar pages