The Articles of Confederation was our first plan of government! It was a weak constitution because most of the power was held by the State Government, leaving the National government obsolete and without a hint of power.
Shay's rebellion showed the weakness of the Confederation government, through protests and revolts. Trying to show that the Articles of Confederation failed to protect the ideals of liberty set forth in the Declaration of Independence.
The Articles of Confederation were replaced by the US Constitution, plan of government which we held until today!