Complex sentence: More than and Royal Navy sailors and airmen were killed and only five of the ships reached Grand Harbour but the arrival of "Ohio", justified the decision to hazard so many warships, its cargo of aviation fuel revitalising the Maltese air offensive against Axis shipping.
Split into simpler sentences: More than and Royal Navy sailors and airmen were killed and only five of the ships reached Grand Harbour. The arrival of "Ohio" justified the decision to hazard so many warships, its cargo of aviation fuel revitalising the Maltese air offensive against Axis shipping.