Complex sentence: On 23 September 1942 the rest of Sparrow Force were then herded into the hold of an old Chinese freighter, the hellship "Dainichi Maru", and transported to Surabaya via Dili coming under attack from Royal Australian Air Force bombers and Royal Navy and Dutch submarines.
Split into simpler sentences: On 23 September 1942 the rest of Sparrow Force were transported to Surabaya in the hold of an old Chinese freighter, the hellship "Dainichi Maru". Sailing via Dili, the ship came under attack from Royal Australian Air Force bombers, and Royal Navy and Dutch submarines.