Complex sentence: When Michael murders Sollozzo and Captain McCluskey, an Irish police officer on the drug lord's payroll, the conflict escalates into a full-scale war which results in Santino's murder and Michael's ascension to the head of the family.
Split into simpler sentences: When Michael murders Sollozzo and Captain McCluskey, an Irish police officer on the drug lord's payroll, the conflict escalates into a full-scale war. This war ultimately results in Santino's murder and Michael's ascension to the head of the family.