Shays' Rebellion was an armed uprising that took place in 1786-1787, led by farmer Daniel Shays and other rural citizens in Massachusetts protesting against economic injustices and the lack of government response to their financial struggles. This event highlighted the weaknesses of the Articles of Confederation, especially in dealing with civil unrest and economic turmoil, leading to calls for a stronger national government and eventually the ratification of the U.S. Constitution.