Complex sentence: One of his squad leaders ignored the orders due to fatigue and disorientation; after his order was ignored a second time, Speirs shot the sergeant between the eyes, then promptly reported the incident to the company commander, Captain Jerre S. Gross.
Split into simpler sentences: One of his squad leaders ignored the orders due to fatigue and disorientation. After his order was ignored a second time, Speirs shot the sergeant between the eyes, then promptly reported the incident to the company commander, Captain Jerre S. Gross.