Why were southern military leaders barred from holding public office after the civil war

Because they did not want any remnant of the southern seperatist government after the war, as many wanted to punish the southern leadership.

The  government  of ancient  egypt  was a theocratic monarchy as the king ruled by a mandate from the gods, initially was seen as an intermediary between human beings and the divine, and was supposed to represent the gods' will through the laws passed and policies approved