This is a long answer.
Strengths
Not many historians today talk about the strengths of the Articles of Confederation, likely because of how unpopular the document quickly became. The Articles did set the legislative body, Congress, as the highest power in the nation because of the fear of monarchy. Congress had the sole power to declare war, assign treaties, entertain foreign relations, and operate post offices. Disputes between states and territorial issues were to be brought to Congress. The document also stipulated that Canada was allowed to enter the Union if they desired.
Weaknesses
There were more weaknesses than strengths under the Articles of Confederation. The lack of power given to the Continental Congress strangled the federal government. The Articles gave Congress the power to pass laws but no power to enforce those laws. If a state did not support a federal law, that state could simply ignore it. Congress had no power to levy taxes or regulate trade. Without a federal court system or executive leader, there would be no way to enforce these laws, either. Amending the Articles of Confederation would also require a unanimous decision, which would be extremely difficult.
