The foreign policy of the Republic of Vietnam (RVN), according to Fishel, "to a very considerable extent", was the policy of Ngo Dinh Diem himself during this period. He was the decisive factor in formulating foreign policies of the RVN, besides the roles of his adviser – Ngô Đình Nhu and his foreign ministers: Trần Văn Độ (1954–1955), Vũ Văn Mẫu (1955–1963) and Phạm Đăng Lâm (1963) who played subordinate roles in his regime. Nevertheless, since Diệm had to pay much attention to domestic issues in the context of the Vietnam War, foreign policy did not receive appropriate attention from him. Diệm paid more attention to countries that affected Vietnam directly and he seemed to personalize and emotionalize relations with other nations. The issues Diệm paid more attention in foreign affairs were: the Geneva Accords, the withdrawal of the French, international recognition, the cultivation of the legitimacy of the RVN and the relations with the United States, Laos (good official relations) and Cambodia (complicated relations, especially due to border disputes and minority ethnicities), and especially North Vietnam. Besides, the RVN also focused on diplomatic relations with other Asian countries to secure its international recognition.