Complex sentence: During the 1991 Gulf War, the Harrier II was considered to be too immature to be deployed; however several aircraft would be dispatched to patrol no-fly zones over Iraq from 1993 onwards.
Split into simpler sentences: During the 1991 Gulf War, the Harrier II was considered to be too immature to be deployed. However, several aircraft were dispatched to patrol no-fly zones over Iraq from 1993 onwards.