Complex sentence: During World War II, many families moved to Bandarawela as leading schools in Colombo such as Royal College, St. Thomas' College and Visakha Vidyalaya, completely shifted to Bandarawela due to the fear caused by the Japanese bombs.
Split into simpler sentences: During World War II, many families moved to Bandarawela following leading schools in Colombo such as Royal College, St. Thomas' College and Visakha Vidyalaya. These schools relocated to Bandarawela due to the fear caused by the Japanese bombs.