The Liberation of Khorramshahr was the Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

ian recapture of the port city of Khorramshahr

Khorramshahr

Khorramshahr is a city in and the capital of Khorramshahr County, Khuzestan Province, Iran. At the 2006 census, its population was 123,866, in 26,385 families.Khorramshahr is a port city located approximately north of Abadan...

 from the Iraq

Iraq

Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

is on May 24, 1982 during the Iran–Iraq War. The Iraqis had captured the city early in the war on October 26, 1980. The successful retaking of the city was part of Operation Beit ol-Moqaddas

Operation Beit ol-Moqaddas

Operation Beit ol-Moqaddas was an Iranian operation conducted during the Iran–Iraq War. The operation was a success, in as so far as it achieved its standing aim of evicting Iraqi troops from the Iranian city of Khorramshahr...

. It is perceived as a turning point in the war and the liberation is celebrated in Iran on its anniversary, 24 May.

The battle

The city remained in Iraqi hands until April 1982, when the Iranians launched Operation Beit ol-Moqaddas to recapture the Khuzestan province. The first attack (April 24 to May 12) consisted of 70,000 Pasdaran (members of Iran's military, the Islamic Revolutionary Guard Corps) and succeeded in pushing the Iraqis out of the Ahvaz-Susangerd area. The Iraqis withdrew back to Khorramshahr and, on May 20th, launched a counter attack against the Iranians, which was repulsed. The Iranians then launched an all out assault on Khorramshahr, capturing two of the defense lines in the Pol-e No and Shalamcheh region. The Iranians gathered around the Shatt al-Arab (known as Arvand Rud in Iran) waterway, surrounding the city and, thus, beginning the second siege. The Iranians finally recaptured the city on May 24th after two days of bitter fighting.

Aftermath

In re-taking the city, the Iranians captured some 19,000 soldiers from a demoralized Iraqi Army.
Iranians celebrate the anniversary of Liberation of Khorramshahr every year.

On the other hand, Saddam was shocked and angry at the defeat in Khorramshahr. He ordered the execution of a number of top Iraqi officers responsible for defence of Khorramshahr.