Complex sentence: The Iranians attacked from the Majnoun Islands, once again taking the Iraqis by surprise, striking at the southern end of Iraq's 4th army corps, on a 12 km wide front.
Split into simpler sentences: The Iranians attacked from the Majnoun Islands, once again taking the Iraqis by surprise. They struck at the southern end of Iraq's 4th army corps, on a 12 km wide front.