Complex sentence: RAF Habbaniya was a Royal Air Force base at Habbaniya in the Kingdom of Iraq and, as of 30 April, the small British garrison there had been under siege by strong Iraqi forces loyal to Rashid Ali.
Split into simpler sentences: RAF Habbaniya was a Royal Air Force base at Habbaniya in the Kingdom of Iraq. As of 30 April, the small British garrison at Habbaniya had been under siege by strong Iraqi forces loyal to Rashid Ali.