I used to listen to this song at school, and the lyrics were things like "Welcome back" and "We're proud of you". I thought it was about a girl (no idea why I specifically thought she was a girl) graduating a boarding high school, and it was sung by her parents.
Later, I learned that it was about welcoming soldiers back after a war, but I thought my version was better.
A childhood belief about songs

others believed things like this
- I used to believe that boarding school was where people went to play board games.Anon
- I thought that wars had to last four years... just like high school and college.— A. Falk
- Until I was in High School, I really thought that the "underground railroad" was under the ground.— S
- I similarly thought that "Proud Mary" included the lyrics "pumped a lot of tanks down in New Orleans."— Larry
- Until junior high school, I thought Monty Python was a wrestler.— Jamie
- When I was younger, I saw Madonna's video for "Material Girl". I thought she was singing "I'm a Cheerio Girl"!— Greg