Saudi Arabia

Saudi Arabia[c] (Listeni/ˌsɔːdiː əˈreɪbiə/, Listeni/ˌsaʊ-/), officially known as the Kingdom of Saudi Arabia (KSA),[d] is an Arab state in Western Asia constituting the bulk of the Arabian Peninsula. With a land area of approximately 2,150,000 km2 (830,000 sq mi), Saudi Arabia is geographically the second-largest state in the Arab world after Algeria. https://en.wikipedia.org/wiki/Saudi_Arabia

cf Middle East, Persian Gulf, Gulf Kingdom

A supposed ally, but don't count on it. Most of the 9/11 (World Trade Center) terrorists were Saudi.