The idea of the supranational European Defence Community came about following a summit in The Hague (1969) in which the EC heads of state and government instructed their foreign ministers to "study the best way of achieving progress in the matter of political unification, within the context of enlargement."
Gagasan supranasional Komunitas Pertahanan Eropa muncul setelah KTT di den Haag (1969), di mana kepala negara EC dan pemerintahan menginstruksikan menteri luar negeri mereka supaya "belajar cara terbaik mencapai kemajuandi dalam unifikasi masalah politik, dalam konteks perluasan."