The Islamic Republic of Iran has two types of armed forces: the regular forces Islamic Republic of Iran Army, Islamic Republic of Iran Air Force, Islamic Republic of Iran Navy and the Islamic Revolutionary Guards Corps (IRGC), totaling about 545,000 active troops.
Iran also has around 350,000 Reserve Force totaling around 900,000 trained troops.Iran has a paramilitary, volunteer militia force within the IRGC, called the Basij, which includes about 90,000 full-time, active-duty uniformed members. Up to 11 million men and women are members of the Basij who could potentially be called up for service; GlobalSecurity.org estimates Iran could mobilize "up to one million men".
This would be among the largest troop mobilizations in the world.In 2007, Iran's military spending represented 2.6% of the GDP or $102 per capita, the lowest figure of the Persian Gulf nations.Iran's military doctrine is based on deterrence.
Since the Iranian Revolution, to overcome foreign embargo, Iran has developed its own military industry, produced its own tanks, armored personnel carriers, guided missiles, submarines, military vessels, guided missile destroyer, radar systems, helicopters and fighter planes. In recent years, official announcements have highlighted the development of weapons such as the Hoot, Kowsar, Zelzal, Fateh-110, Shahab-3 and Sajjil missiles, and a variety of unmanned aerial vehicles (UAVs). The Fajr-3 (MIRV) is currently Iran's most advanced ballistic missile, it is a liquid fuel missile with an undisclosed range which was developed and produced domestically.
Iran’s ballistic arsenal is one of the largest in the Middle East, and, according to the Director of National Intelligence, many of Iran’s missiles are “inherently capable of carrying a nuclear payload.” Iran has made important technical strides in recent years with regard to missile development: it has successfully placed three satellites into low earth orbit using its own two-stage launch vehicle; it has built and successfully tested multi-stage missiles; it has improved missile guidance; and it has improved and diversified the fuel used to propel its missiles. These developments allow Iran to extend the range of its missiles and to deploy and fire them more quickly. Iran has also worked to ensure survivability of its missiles: they can be mounted on mobile launchers and deployed to newly built silos.
Iran’s arsenal of liquid- and solid-fueled ballistic missiles has grown steadily. The Shahab-3 ballistic missile has been deployed for several years. Iran is believed to have fielded several hundred, which have a range of about 1,300 km, and to developed variants of the Shahab-3 with an extended range. Iran has also displayed and successfully tested the solid-fueled Sejil, a two-stage ballistic missile with an estimated range of over 2,000 km. These missiles could be adapted to carry a nuclear warhead.