Final answer:
The Second Continental Congress started writing the Articles of Confederation in 1777 during the Revolutionary War and later replaced it with the United States Constitution in 1789.
Step-by-step explanation:
The Second Continental Congress started writing the Articles of Confederation in 1777, during the Revolutionary War. This document was the first constitution of the United States. It established a weak central government, which was later replaced by the current United States Constitution in 1789.
Learn more about Articles of Confederation