evidence: From the date of its establishment in September 1932, Saudi Arabia enjoyed full international recognition as an independent state, although it did not join the League of Nations. In 1934 Ibn Saud was involved in war with Yemen over a boundary dispute. An additional cause of the war was Yemen’s support of an uprising by an Asiri prince against Ibn Saud. In a seven-week campaign, the Saudis were generally victorious. Hostilities were terminated by the Treaty of Al-Ṭāʾif, by which the Saudis gained the disputed district. Diplomatic relations with Egypt, severed in 1926 because of an incident on the Meccan pilgrimage, were not renewed until after the death of King Fuʾād of Egypt in 1936. Fixing the boundaries of the country remained a problem throughout the 1930s. In tribal society, sovereignty was traditionally expressed in the form of suzerainty over certain tribes rather than in fixed territorial boundaries. Hence, Ibn Saud regarded the demarcation of land frontiers with suspicion. Nevertheless, the majority of the frontiers with Iraq, Kuwait, and Jordan had been demarcated by 1930. In the south, no agreement was reached on the exact site of the frontiers with the Trucial States and with the interior of Yemen and Muscat and Oman.