Which contribution did Sunni Ali make to the Songhai Empire? He united the Songhai Empire and brought about a period of peace.
He oversaw the construction of schools and universities.
He made Islam the official religion of the Songhai Empire.
He increased agriculture and introduced a new crop, cotton.

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.