Which event happened before the U. S. constitution adopted?

By 1786, defects in the post-Revolutionary War Articles of Confederation were apparent, such as the lack of central authority over foreign and domestic commerce. Congress endorsed a plan to draft a new constitution, and on May 25, 1787, the Constitutional Convention convened at Independence Hall in Philadelphia.

Explanation:

But it took until June 21, 1788 for the document to be adopted when New Hampshire became the ninth state to ratify the Constitution. The Constitutional Convention, convened by Congress to address the flaws of the Articles of Confederation, had crafted an entirely new framework for governance the previous September.