At the Congress of Vienna, one of the main goals was to

His defeat created the need for the Vienna Congress. It is why it’s expedient to know what the goal of the Congress of Vienna was. The congress took place based on three significant goals. One of the goals was to establish a balance in power.

Explanation:

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.

c, they united with once