The term KEY FORT is a crossword solution for the word MCHENRY, which is a seven-letter word. KEY FORT was a FORT built in 1794 by James McHenry, an Irish-born American military surgeon and statesman who served as the third United States Secretary of War from 1796 to 1800. The FORT was located on the Patapsco River near Baltimore, Maryland and was used to protect the city from British attack during the War of 1812.