On September 22, 1980, Iraqi forces invaded Iran, which was still struggling in the aftermath of its revolution. The resulting war—ostensibly a territorial dispute—turned into a bloody stalemate that saw the first widespread use of chemical warfare since World War I. An estimated 1.5 million people were killed in the conflict. After nearly eight years, the United Nations mandated a cease-fire. Both sides held thousands of prisoners of war for years. When were the last prisoners exchanged? Discuss
Source: The Free Dictionary