Complex sentence: All Iraqi airbases near Iran were out of order for weeks and according to Iran, Iraq's aerial efficacy was reduced by 55%, allowing Iranians to regroup and prepare for the upcoming Iraqi invasion.
Split into simpler sentences: All Iraqi airbases near Iran were out of order for weeks and, according to Iran, Iraq's aerial efficacy was reduced by 55%. This allowed Iranians to regroup and prepare for the upcoming Iraqi invasion.