Who was the grandfather of the man confined to the American coastal pentagonal bastion fort known for its role in the War of 1812?
Frank Key Howard: Frank Key Howard (1826 - 1872) (also cited as Francis Key Howard) was the grandson of Francis Scott Key and Revolutionary War colonel John Eager Howard. Frank Key Howard:  Howard was initially confined to Fort McHenry, the same fort his grandfather Francis Scott Key saw withstand a British bombardment during the War of 1812, which inspired him to write The Star Spangled Banner, which would become the national anthem of the United States of America. Fort McHenry: Fort McHenry, in Baltimore, Maryland, is a historical American coastal pentagonal bastion fort best known for its role in the War of 1812, when it successfully defended Baltimore Harbor from an attack by the British navy from the Chesapeake Bay September 13–14, 1814.
Francis Scott Key