He will need to know and do more than the military commander in Chief because he is accountable to the country. Especially in countries where there are several people among them.
He must know and do more than the commander was responsible for many of the country. Especially in countries in which there were many, many among these.
He must know and can do more than military commanders are responsible for the fate of the country. Because Especially in countries where there are many, among many of them