Complex sentence: Commanders were appointed from retired military personnel and civilians with weapons experience, and training sessions were held for all male civilians between the ages of 15 to 60 years, and unmarried females of 17 to 40 years.
Split into simpler sentences: Commanders were appointed from retired military personnel and civilians with weapons experience. Training sessions were held for all male civilians between the ages of 15 to 60 years, and unmarried females of 17 to 40 years.