The Assembly of the Western European Union, also called the European Security and Defence Assembly, was a parliamentary assembly for delegations from the national parliaments of the member countries of the Western European Union (WEU), a security and defence organisation. Its final session was on 10 May 2011. History Located in Paris, the Assembly was founded in 1954 when the 1948 Brussels Treaty on European security and defence cooperation was modified to establish the Western European Union. It contains an unconditional mutual defence commitment on the part of member states (Article V). The article stipulates that - “If any of the High Contracting Parties should be the object of an armed attack in Europe, the other High Contracting Parties will, in accordance with the provisions of Article 51 of the Charter of the United Nations, afford the Party so attacked all the military and other aid and assistance in their power”. The Assembly, whose first session was held on 5 July 1955, scrutinizes the full implementation of the collective defence obligation laid down in Article V of the treaty. Article IX of the modified Brussels Treaty obliges WEU member governments represented in the council to provide national parliamentarians, who sit in the Assembly, with a written annual report on their security and defence activities. As yet no such obligation exists on the part of the European Council vis-à-vis the European Parliament. Hence, the Assembly is currently acting as an interparliamentary forum for the Common Security and Defence Policy (CSDP) on the basis of parliamentary instruments for which the WEU legal framework makes provision. Following the transfer of the WEU's operational activities to the EU, the Assembly's interparliamentary scrutiny continued to monitor and support intergovernmental cooperation in the field of security and defence, thereby increasing transparency and democratic accountability. The work of the Assembly and its recommendations, to which governments are bound to reply, ensured that cooperation between governments at the European level is mirrored by cooperation between national parliamentarians meeting at the same level. With the Lisbon Treaty expanding the EU's role and accountability, the European Parliament called for the abolition of the assembly. However it was agreed at the end of March 2010 to abolish the whole of the WEU. The assemblies functions were wound up in May 2011, although there is hope from members that work would continue in some form through provisions encouraging cooperation between the national