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Discovery of oil.
October 16 of 1931 the first oil well was descovered in the Persian Gulf, witch is located in Bahrain. The inital oil flow rate was 400 barrels per hour .The well situated below Jebel Dukhan. Also Bahrain was the first place on the Arabian side of the Persian Gulf were oil was descovered! i.e info = http://en.wikipedia.org/wiki/First_Oil_Well,_Bahrain -
Islamic Revolution Of Iran.
i.e. info =