Operation Morvarid in Iran–Iraq War

Date: November 28, 1980 • Location: Bandar Abbas, Iran, Islamic Republic of

Iran–Iraq War: Operation Morvarid: The bulk of the Iraqi Navy is destroyed by the Iranian Navy in the Persian Gulf. (Commemorated in Iran as Navy Day.)

The Iran–Iraq War, also called the First Imposed War, Eight-Year War, or Sacred Defense by Iran, began with the Iraqi invasion of Iran in September 1980. After eight years of conflict, both countries accepted a ceasefire deal brokered by the United Nations, which became effective in August 1988. The war caused around 500,000 deaths, making it the deadliest conventional war ever fought between regular armies of developing countries.