The Arabian Peninsula region received special attention from the major powers during the First World War, as it was the node of land, sea and air communications between Europe and the Far East, as well as the international competition in the southwestern region of the Arabian Peninsula for control of the coast extending to the Red Sea. Contemporary historical studies have tended to study the history of this region by adopting the methodology of revealing British and Ottoman documents to reach historical facts to identify political events and developments in bilateral relations between the countries of the region. And the entire Middle East, without paying attention to the roots and basic structures of relations or crises between the House of Saud on the one hand and the forces surrounding them in the region. In this study, we tried to trace the Saudi-Yemeni relations in their first seeds at the beginning of the twentieth century after the international-regional changes that the Middle East witnessed at the end of the First World War and their effects on the political reality of the Arabs and their civilizational future. Al-Azmi, which escalated Saudi-Yemeni relations in their later historical stages, and what we are witnessing today of the escalating crisis on the common borders between the two countries.