The Shah's rule over this period was marked with close ties to the United States. During this period, the Shah attempted to modernize Iran and was successful in many areas including modernizing the military, advancements in woman's suffrage, and nationalizing some of the countries natural resources. During his reign, Iran marked 2,500 straight years of continuous monarchy since the founding of the empire and Cyrus the Great.
However, many Iranians were suspicious of the Shah and the way he assumed power with the help of the United States and Great Britain. Coupled with growing unrest of a poor economy, the Shah would eventually be overthrown by the Iranian Student Revolution.