Complex sentence: The initial informal response was soon joined by surviving policemen, firefighters and military personnel who began to arrive, as did anyone with a working vehicle; cars, trucks and delivery wagons of all kinds were enlisted to collect wounded.
Split into simpler sentences: The initial informal response was soon joined by surviving policemen, firefighters and military personnel who began to arrive, as did anyone with a working vehicle. Cars, trucks and delivery wagons of all kinds were enlisted to collect wounded.