Complex sentence: With the arrival of American forces on Luzon Island, Zipper set out reorganizing his disbanded orchestra, but some members of the orchestra did not survive the Battle of Manila, including concertmaster Ernesto Vajello.
Split into simpler sentences: With the arrival of American forces on Luzon Island, Zipper set out reorganizing his disbanded orchestra. Tragically, some members of the orchestra did not survive the Battle of Manila including concert master, Ernesto Vajello.