Complex sentence: The crew abandoned the ship, boarding that had arrived to Ohios aid alongside another destroyer,, which was however soon to leave the stricken tanker after being ordered to go in search of the cruiser, crippled by Italian motor torpedo boats.
Split into simpler sentences: The crew abandoned ship, boarding that had come to Ohios aid alongside another destroyer,. The latter ship was soon to leave the stricken tanker after being ordered to go in search of the cruiser, which had been crippled by Italian motor torpedo boats.