evidence: Territorial Disputes: North Yemen (Sana) claimed the Kamarān Islands and Barīm (Perim) Island held by South Yemen; sections of the boundary with North Yemen indefinite or undefined; no defined boundary with Saudi Arabia; claimed the Khurīyā Murīyā Islands from Oman 1967-1990; Administrative Line with Oman. [...] 9 Jun 1915 - 30 Nov 1967 [...] 22 May 1990 Unification as Republic of Yemen (al-Jumhuriyya al-Yamaniyya). 21 May 1994 - 7 Jul 1994 Former South Yemen (Aden) in secession as (Democratic Republic of Yemen).