Question: What war led Francis Scott Key to pen the Star-Spangled Banner?

Answer: The War of 1812, which was officially declared by Congress 209 years ago on June 18, 1812. Francis Scott Key penned the poem entitled "The Defence of Fort M'Henry" after he saw the Maryland Fort bombarded by the British in the War of 1812. The poem was later set to music and finally named as the national anthem in 1931.