Battle of Khorramshahr
1980 CE.
Shown on the map at 30.433°, 48.167°.
The First Battle of Khorramshahr was a major battle in the Iran–Iraq War, beginning shortly after the Iraqi invasion of Iran in September 1980. Amidst the gruelling urban warfare in and around the city, Khorramshahr came to be referred to by the Iranians as Khuninshahr (Persian: خونین شهر, lit. 'City of Blood'), as both sides had suffered heavy casualties in combat. It was the single largest urban battle of the Iran–Iraq war. Though Iraq ultimately captured the city, it had come at a high cost; the offensive into Khorramshahr, which took 34 days, drew an immense investment of troops, far beyond what Iraqi war plans had envisaged. The incredible delay allowed Iran to stabilize the frontlines at Dezful, Ahvaz, and Susangerd, consequently enabling the relatively swift mobilization of Iranian reinforcements into oil-rich Khuzestan, which Iraq had sought to annex.
Text from the Wikipedia article Battle of Khorramshahr (1980), licensed CC BY-SA 4.0.