摘要:During second Pahlavi period, not only political-diplomatic relations between Iran and the U.S. were broken off, but at the same time, an excessive growth in bilateral relations can also be observed. Alongside the détente, U.S.’s military withdrawal from Vietnam, and the outbreak of protests and civil movements in the U.S., Iran had been entitled as the “gendarme of the region” and Shah became the defender of Western interests in the region. Such good relations are pursued under both Democrats and Republicans. The present article claims that becoming the gendarme of the region was not just a product of developments at the international level, but internal conditions were also influential. However, it is the U.S. decision which eventually gave precedence to the influence made by the international level. The reason that Iran was chosen, was based on its various political and leading capabilities in contrast to other countries of the region.