Complex sentence: During the Second World War, Japanese Fighter and Bomber planes was invasion in the province of Kalinga-Apayao around the bombings and destroyed the air raids was around the towns and municipalities on December 1941 during the Japanese Invasion of the Philippines.
Split into simpler sentences: During the Second World War, Japanese Fighter and Bomber planes invaded the province of Kalinga-Apayao. The bombings and air raids destroyed the towns and municipalities on December 1941 during the Japanese Invasion of the Philippines.