revolution did not spread across the Persian Gulf, while the Soviet Union was concerned about the potential threat posed to its rule in central Asia to the north. However, Iran had large amounts of ammunition provided by the United States of America during the Shah's era and the United States illegally smuggled arms to Iran during the 1980s despite Khomeini's anti-Western policy (see Iran–Contra affair). During war Iranians used human wave attacks (people walking to certain death including child soldiers) on Iraq, with his promise that they would automatically go to paradise—al Janna— if they died in battle, and his pursuit of victory in the Iran–Iraq War that ultimately proved futile. By March 1984, two million of Iran's most educated citizens had left the country This included an estimated one and a half million that had fled Iran, victims of political executions, and the hundreds of thousands of "martyrs" from Khomeini's bloody "human wave " attacks on Iraq. In July 1988, Khomeini, in his words, "drank the cup of poison" and accepted a truce mediated by the United Nations. Despite the high cost of the war – 450,000 to 950,000 Iranian casualties and US$300 billion – Khomeini insisted that extending the war into Iraq in an attempt to overthrow Saddam had not been a mistake. In a "Letter to Clergy" he wrote: "... we do not repent, nor are we sorry for even a single moment for our performance during the war. Have we forgotten that we fought to fulfill our religious duty and that the result is a marginal issue?" Fatwa against chemical weapons In an interview with Gareth Porter, Mohsen Rafighdoost, the eight-year war time minister of the Islamic Revolutionary Guard Corps, disclosed how Khomeini had opposed his proposal for beginning work on both nuclear and chemical weapons by a fatwa which had never been made public in details of when and how it was issued. Rushdie fatwa In early 1989, Khomeini issued a fatwa calling for the assassination of Salman Rushdie, an India-born British author. Rushdie's book, The Satanic Verses, published in 1988, was alleged to commit blasphemy against Islam and Khomeini's juristic ruling (fatwā) prescribed Rushdie's assassination by any Muslim. The fatwā required not only Rushdie's execution, but also the execution of "all those involved in the publication" of the book. Khomeini's fatwā was condemned across the Western world by governments on the grounds that it