Played the Arabian Peninsula site an important role in trade, between India sources the commercial products, and her Consumer the world old. Increased of importance of the site, because the Dealers became in southern Arabian Peninsula monopolized that trade for several centuries, they have gained the great wealth of this trade, which helped them build their kingdoms, made famous in the ancient world. The trade was oscillating between the boom and collapse, depending on the political events, which were witnessing areas that experienced by the trade routes, especially north of the Arabian Peninsula, which has seen a lot of competition between the ancient kingdoms and empires (Sassanid, Greek and Roman) for control of the trade, which ends in the cities and ports of the Northern Arabia countries (Gaza, Palmyra, Petra) Has dominated economic nature of these wars. Where hastened those empires and kingdoms to send campaigns land, and sea, order to explore the ancient trade sources. Reached those campaigns to the coast of the Arabian Peninsula, and the coast of the West Indies, the Persians was the pioneers in this domain, followed by campaigns Alexander the Macedonians exploratory, But all these attempts did not bear fruit, only in the era of the Romans, who discovered that India is the source of that wealth, As Thanks in this discovery to the navigator Hippalus which discovered the movement of the monsoon in the Indian Ocean, and the consequent this discovered, positive results for some and negative on some others.