Complex sentence: Four Indian Navy warships that were a part of Task Force 54 that were returning back to India from the Mediterranean after a goodwill visit where ordered to turn back just before they were to cross the Suez Canal to assist the evacuation.
Split into simpler sentences: Four Indian Navy warships that were a part of Task Force 54, were returning to India from the Mediterranean after a goodwill visit. They were ordered to turn back just before they were to negoiate the Suez Canal in order to assist in the evacuation.