محافظة البصرة
The Siege of Basra, code-named Operation Karbala-5 (), was an offensive operation carried out by Iran in an effort to capture the Iraqi port city of Basra in early 1987. This battle, known for its extensive casualties and ferocious conditions, was the biggest battle of the war and proved to be the beginning of the end of the Iran–Iraq War. While Iranian forces crossed the border and captured the eastern section of Basra Governorate, the operation ended in a stalemate.