Complex sentence: During Ahmose's time the Egyptian state was unified again and Egypt became one of the main Near-Eastern powers, his reign is therefore seen as the end of the Second Intermediate Period and the start of New Kingdom.
Split into simpler sentences: During Ahmose's time the Egyptian state was unified again and Egypt became one of the main Near-Eastern powers. His reign is therefore seen as the end of the Second Intermediate Period and the start of New Kingdom.