Final answer:
The original version of the National Anthem was called "In Defense of Fort McHenry" and was later set to the tune of a British song called "The Anacreontic Song."
Step-by-step explanation:
The original version of the National Anthem was called "In Defense of Fort McHenry." After the British bombed Baltimore's Fort McHenry in 1814, Francis Scott Key was inspired by the sight of the American flag still hanging. He wrote the poem "In Defense of Fort McHenry," which later became the lyrics for the U.S. national anthem, "The Star-Spangled Banner." Key's poem was set to the tune of a British song called "The Anacreontic Song."