A reminder via Strife blog (Kings War Studies) that "location, location" is not always a factor and yes the island is Perim in the Gulf of Aden (Yemeni territory):
Despite lying in the middle of one of the world’s most critical choke points, the Bab-el-Mandeb Strait between Djibouti and Yemen, the island of Perim is a remote and often forgotten outpost. Perim is located in the midst of the waterway which separates the Red Sea from the Gulf of Aden....
Link:https://strifeblog.org/2016/06/29/pe...hat-never-was/

I have wondered why the far larger, but further away from land, Socotra has not had a strategic role. IIRC again a lack of a water supply in such a climate features.