 Following the decision of the International Court of Justice at the Hague in 1971 that South African rule in Namibia was illegal, Kapuuo, as the leader of NUDO was instrumental in forming the National Convention.The National Convention included SWAPO under David Meroro, SWANU under Gerson Veii and several other political groups, and demanded an immediate take-over of Namibia by the United Nations in preparation for independence.In 1973, however, the United Nations declared SWAPO the sole authentic representative of the people of Namibia, and this soured relations between NUDO and SWAPO.