Why did shays rebelion upset political leaders and what did this rebelion convence the leaders they needed to do?

Shay's rebellion showed that the government under the Articles of Confederation is weak. It is weak because it was not strong enough (doesn't have own militia unlike the federalist governement) to reppel the insurgency (rebellion), and it was unable to enforce laws reasonably and effectively (like the oppressive taxation that took away farmers money/ land, which was the main cause of Shay's rebellion). It wound down in 1787 with the election of a more popular governor, an economic upswing, and the creation of the Constitution of the United States in Philadelphia.

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.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.