What caused fears of a rebellion against the national government, and led the states to call for a convention to fix the Articles of Confederation?

Shays’s Rebellion and The lack of power that given to the national government

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.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

the chair is the committee member from the majority party who has the most seniority. in the south carolina senate, the chair is the committee member from the majority party who has the most committee seniority.