Complex sentence: According to the Turkish constitution, he is responsible to the Prime Minister, in peacetime, he serves as the Commander of the Turkish Armed Forces and in times of war, he assumes the "Commander in Chief" authority on behalf of the President.
Split into simpler sentences: According to the Turkish constitution, he is responsible to the Prime Minister. In peacetime, he serves as the Commander of the Turkish Armed Forces and in times of war, he assumes the "Commander in Chief" authority on behalf of the President.