Complex sentence: The separation occurred due to a number of grievances based on a lack of sufficient public services, including; lack of a modern sewage system, poor schools, neglected roads, and minimal public safety measures.
Split into simpler sentences: The separation occurred due to a number of grievances. Primarily they were based on a lack of sufficient public services, including; lack of a modern sewage system, poor schools, neglected roads, and minimal public safety measures.