Complex sentence: On August 9, Lieutenant Isao Ōyama (大山勇夫) of the Japanese Marines attempted an illegal entry into the Hongqiao Airport (虹橋機場) of Shanghai, but was shot to death by the Chinese Peace Preservation Corps stationed near the military airport.
Split into simpler sentences: On August 9, Lieutenant Isao Ōyama (大山勇夫) of the Japanese Marines attempted an illegal entry into the Hongqiao Airport (虹橋機場) of Shanghai. He was shot dead by the Chinese Peace Preservation Corps stationed near the military airport.