Complex sentence: Skip Bombing was a low level bombing technique developed by the United States air force in the Southwest Pacific theatre during World War II for use against shipping in which bombs were skimmed across the surface of the sea in a manner similar to stone skipping.
Split into simpler sentences: Skip Bombing was a low level bombing technique developed by the United States air force in the Southwest Pacific theatre during World War II for use against shipping. Bmbs were skimmed across the surface of the sea in a manner similar to stone skipping.