4 What was the most important accomplishment of the Articles of Confederation its one lasting legacy. It allowed Congress to pass laws about how the new western. Articles Of Confederation Timeline Strengths Weaknesses More Despite its drawbacks one cannot deny the fact that the Articles of Confederation was the first constitution of the United States and its biggest strength was its ability to bring all the thirteen original states together in order to establish a common legislature. . Having many advanced weapons. 12 How did the Constitution resolve the weaknesses of the Articles of Confederation. 10 What was the most important accomplishment of the Articles of Confederation its one lasting legacy. Despite its drawbacks one cannot deny the fact that the Articles of Confederation was the first constitution of the United States and its biggest strength was its ability to bring all the thirteen original states together in or