Answer:
Shays’s Rebellion and The lack of power that given to the national government
Step-by-step explanation:
In the earlier draft of the Articles of Confederation, we haven't established a law that gave the power for the central government. This prevented the national government to gather a centralized military forces that they can mobilize to handle conflicts that occurred in the country.
During the shay rebellions, The Farmers in Massachusetts conducted a violent protest in rejection of the economic policies proposed by the government. At that time, the government feared that the rebellions will spread to other territories and turn the country into chaos. This was the reason why they all for a convention to fix the Articles of Confederation to increase the power of the federal government's military.