The proponents of annexation joined in several local committees. On 19 June 1945, the Hague committee to examine the question of Dutch territorial expansion was founded. During a meeting of this committee on 12 July 1945, it was decided to split the committee in the Study Group Territorial Expansion (Studiegroep Gebiedsuitbreiding), chaired by Ph.J. Idenburg, and the Action Committee (Comité van Actie), which had as its primary function the education of the Dutch population about the expansion plans.