I myself would have to say it would have been in the early 20th century looking at the timeline. In 1933 the u.s entered into a profit sharing oil company called the arabian-american oil company. In 1943 president franklin roosevelt declared a defense with saudi abiriba of vital interest to the u.s and made them eligible for lend lease assistance. 1945 the u.s places an air base dhahran. In 1951 the CIA sets up a radio liberty to broadcast anti-communists programs. in 1954 a member of the secret wing attempted to kill Gamal abdel nasser. getting banned from Egypt being forced underground. and in 1970 a more strained begins to develop.
