CAMP LULLABY is a term used to describe a traditional military song, usually played at the end of the day or during ceremonies. The most well-known version of this song is 'Taps', which is a four-letter word that is often used as a crossword solution for CAMP LULLABY. Taps is a bugle call that was first used by the United States Army in the late 19th century and has since become a symbol of remembrance and respect for those who have served in the military.