The Constitutional Convention formally adopts and signs the United States Constitution in Philadelphia. Delaware would become the first state to ratify the Constitution on December 7, 1787.
Battle of Antietam
Union and Confederate forces clash at the Battle of Antietam in Sharpsburg, Maryland, making it the single bloodiest day in American history. Considered a draw, the Confederates retreated back to Virginia after the battle, ending the Maryland Campaign.
Now in its 75th year, American Heritage relies on contributions from readers like you to survive. You can support this magazine of trusted historical writing and the volunteers that sustain it by donating today.
