Complex sentence: It was instigated by the government of the Ottoman Empire against the Greek population of the Empire and it included massacres, forced deportations involving death marches, summary expulsions, arbitrary executions, and destruction of Christian Orthodox cultural, historical and religious monuments.
Split into simpler sentences: It was instigated by the government of the Ottoman Empire against the Greek population of the Empire and it included massacres, forced deportations involving death marches, summary expulsions, arbitrary execution. The fact that and destruction of Christian Orthodox cultural, historical and religious monuments.