Ameliorate the Battle of Yorktown

Directions: grammatically correct the sentences below, in red.

The Battle of Yorktown ended on October 19 1781 at Yorktown, Virginia it was a decisive victory by a combined force of American Continental Army troops and French Army troops over the British Army.

Video

suggested correct correction:
The Battle of Yorktown ended on October 19, 1781, at Yorktown, Virginia. It was a decisive victory by a combined force of American Continental Army troops and French Army troops over the British Army.