The 1974–75 Shatt al-Arab conflict took place between the Imperial State of Iran and Ba'athist Iraq from April 1974 to March 1975, and occurred as a direct result of their territorial dispute in the region. It was concentrated around the Shatt al-Arab, a river in Western Asia that partly flows along the Iran–Iraq border. The conflict took place over the course of 11 months and resulted in over 1,000 total casualties. It was the most significant spike of bilateral tensions between Iran and Iraq over the Shatt al-Arab waterway in times, and the continued border dispute and disagreements over this region both before and after the conflict ultimately led to the protracted Iran–Iraq War in the 1980s following the Iranian Revolution and subsequent establishment of the Islamic Republic of Iran.