In August 1939, World War II broke out. The following year the school was requisitioned in part by the Royal Artillery for their headquarters. The Primary School shifted to Tammita Church grounds into temporary cadjan sheds. Then Royal Artillery moved out in November, but the Royal Air Force occupied the buildings in March the following year. The College was put under protection of Our Lady of Perpetual Help. There were frequent practices of Air Raid Precautions in schools. Trenches were dug for shelter, and every child knew what to do in case of an air raid warning. The school was in Easter holidays when the Japanese Air Raid took place in 1942 but their invasion fleet was turned back.