the Shah for trial in Iran for crimes against the nation. Although the Shah died a few months later, during the summer, the crisis continued. In Iran, supporters of Khomeini named the embassy a "Den of Espionage", publicizing details regarding armaments, espionage equipment and many volumes of official and classified documents which they found there. Relationship with Islamic and non-aligned countries Khomeini believed in Muslim unity and solidarity and the export of his revolution throughout the world. He believed Shia and (the significantly more numerous) Sunni Muslims should be "united and stand firmly against Western and arrogant powers." "Establishing the Islamic state world-wide belong to the great goals of the revolution." He declared the birth week of Muhammad (the week between 12th to 17th of Rabi' al-awwal) as the Unity week. Then he declared the last Friday of Ramadan as Quds Day in 1981. Iran–Iraq War Shortly after assuming power, Khomeini began calling for Islamic revolutions across the Muslim world, including Iran's Arab neighbor Iraq, the one large state besides Iran with a Shia majority population. At the same time Saddam Hussein, Iraq's secular Arab nationalist Ba'athist leader, was eager to take advantage of Iran's weakened military and (what he assumed was) revolutionary chaos, and in particular to occupy Iran's adjacent oil-rich province of Khuzestan, and to undermine Iranian Islamic revolutionary attempts to incite the Shi'a majority of his country. In September 1980, Iraq launched a full-scale invasion of Iran, beginning the Iran–Iraq War (September 1980 – August 1988). A combination of fierce resistance by Iranians and military incompetence by Iraqi forces soon stalled the Iraqi advance and, despite Saddam's internationally condemned use of poison gas, Iran had by early 1982 regained almost all of the territory lost to the invasion. The invasion rallied Iranians behind the new regime, enhancing Khomeini's stature and allowing him to consolidate and stabilize his leadership. After this reversal, Khomeini refused an Iraqi offer of a truce, instead demanding reparations and the toppling of Saddam Hussein from power. In 1982, there was an attempted military coup against Khomeini. The Iran–Iraq War ended in 1988, with 320,000–720,000 Iranian soldiers and militia killed. Although Iran's population and economy were three times the size of Iraq's, the latter was aided by neighboring Persian Gulf Arab states, as well as the Soviet Bloc and Western countries. The Persian Gulf Arabs and the West wanted to be sure the Islamic