Israel in the Iran–Iraq War

Israel's role in the Iran–Iraq War consisted of support provided by Israel to Iran during the Iran–Iraq War from 1980 to 1988. During the war, Israel was one of the main suppliers of military equipment to Iran. Israel also provided military instructors during the war, and in turn received Iranian intelligence that helped it carry out Operation Opera against Iraq's Osirak nuclear reactor. The nuclear reactor was a central component of Iraq's nuclear weapons program.

Israel supported Iran during the war so that Iran could provide a counterweight to Iraq; to re-establish influence in Iran which Israel lost with the overthrow of the shah in 1979, and to create business for the Israeli weapons industry. The Israeli arms sales to Iran also facilitated the unhindered immigration of the Persian Jewish community from Iran to Israel and the United States. Israel's support for Iran during the war was done clandestinely, and Iran publicly denied any cooperation between the two countries.