Complex sentence: During World War II, Japanese fighter and bomber planes was invaded the province of Rizal on December 1941 during the Japanese Invasion and through the entering the province of Rizal by the occupation of the Imperial Japanese armed forces on 1942 during the Japanese Occupation.
Split into simpler sentences: During World War II, Japanese fighter and bomber planes bombed the province of Rizal on December 1941. During the Japanese Invasion and through the entering the province of Rizal by the occupation of the Imperial Japanese armed forces on 1942 during the Japanese Occupation.