Complex sentence: However, sergeants and staff sergeants of the USMC have more than eight year of training/servcie and commands 13 man units and staff sergeatns may also act as a deputy platoon leader.
Split into simpler sentences: However, sergeants and staff sergeants of the USMC have more than eight year of training/servcie and commands 13 man units. Staff sergeatns may also act as a deputy platoon leader.