Which of the following happened in 1812?

This year, the U. S. city of Baltimore, Maryland is celebrating its role in the birth of America’s national anthem.(30)Two of the greatest symbols of the United States came out of a British attack during the War of 1812.
    Now, the flag had already been invented, but it hadn’t really caught on yet. It was really the words of Francis Scott Key who, upon seeing the flag over this battlefield on September 14th, 1814, 200 years ago, that really led to the flag becoming the great national icon for the United States that it is today.