https://en.wikipedia.org/wiki/Mutawakkilite_Kingdom_of_Yemen
The Mutawakkilite Kingdom of Yemen (Arabic: المملكة المتوكلية اليمنية al-Mamlakah al-Mutawakkilīyah al-Yamanīyah), also known simply as the Kingdom of Yemen or as Yemen, or, retrospectively, as North Yemen, was a state that existed between 1918 and 1962 in the northwestern part of what is now Yemen.Its capital was Sana'a until 1948, then Taiz.