This book studies the role of the Persian Gulf oil as a geoeconomic factor in the US military intervention in the Persian Gulf region. This role is related to the US attempts to preserve its world leadership position and reconstruct a new geopolitical world order. This study focuses on analyzing the US geopolitical code during the first term of the George W. Bush presidency between 2001 and 2004. Data analysis reveals that there has always been a close connection between geopolitical codes of the United States and its world leadership position. Since the Second World War, the importance of the Persian Gulf region remained as prominent geopolitical assumption in defining the US geopolitical codes and based on US geopolitical codes, all threats to this vital area must be countered by force. That justified a pre-emptive war against Iraq to preserve US interests. It would mean reinforcing the US presence in the region as well as controlling the richest oil area in the world. It would help to impose the US global geopolitical code on other states in the reconstruction of the new geopolitical world order in order that the US world leadership would continue.