Bombing of Bahrain in World War II

The bombing of Bahrain in World War II was part of an effort by the Italian Royal Air Force ("Regia Aeronautica") to strike at the British interests wherever possible in the Middle East. While the mission caused little damage, it was successful in forcing the diversion of already-limited Allied resources to an obscure theater originally thought to be safe.
Background.
On 10 June 1940, the Kingdom of Italy declared war on the French Republic and the United Kingdom. The Italian invasion of France was short-lived and the French signed an armistice with the Italians on 25 June, three days after France's armistice with Germany. This left the British and the forces of the Commonwealth of Nations for the Italians to contend with in the Middle East. 
In summer 1940, the Italian leader and Prime Minister Benito Mussolini received a plan to destroy the oil fields in Bahrain in order to disrupt the oil supplies to the British Navy. The plan was suggested by the Italian test pilot, Air Force Captain Paolo Moci and promoted by Ettore Muti, who was in charge of the attack.
Bahrain (and Dhahran, Saudi Arabia).
Early on October 19, 1940, three of four Italian SM.82s bombers attacked American-operated oil refineries in the British Protectorate of Bahrain, damaging the local refineries. Meanwhile, the fourth bomber which trailed behind struck Dhahran in Saudi Arabia, but causing only some minor damage.
Indeed, in order to strike the British-controlled oil refineries at Manama in the Persian Gulf, these SM82s bombers undertook a flight of 4,200 km (2,610 mi), lasting 15 hours at 270 km/h (170 mph), that was for the time arguably a record for a bombing mission. Each aircraft carried a load of 1,500 kg (3,310 lb). This long-range action was successful, taking the target totally by surprise, and the SM.82s landed without problems at Zula, Eritrea. The Italian airplanes started their flight from Europe, attacked refineries in Asia and landed back in Africa (Italian Eritrea).
During the attack were dropped 132 bombs of 15 kg, that heavily damaged 2 refineries 
The raid caused the Allies some concerns, forcing them to upgrade their defences. This, more than the limited amount of damage caused, further stretched Allied military resources.
Rome declared that their bombers had set a new distance record, covering 3,000 miles on the outgoing trip from bases located in the island of Rhodes in the Italian Islands of the Aegean. American Magazine "Time" wrote that the Italians insisted that the planes had been refueled from submarine tankers, though in actuality the planes had simply been loaded with more than 1,300 gallons of fuel.
Ettore Muti, Party Secretary of the National Fascist Party, took part in the Bahrain raid (as commander) and in at least one of the bombings of Haifa.
The Bahrain raid was followed by other long-distance Italian raids on Ethiopia and Eritrea in 1942. 
It would have been repeated -with an advanced SM.82 bomber- in a raid on New York City in summer 1943 had Italy not capitulated in 1943. Even a commercial aerial trip was done between Rome and Tokyo in summer 1942.