Factual error: The movie takes place around the time of WWI, definitely before 1923. In the carnival scene, the calliope is heard playing "Ain't She Sweet". This was the number one song ... in 1927.
Factual error: The opening scenes in 1918 Monterey show a US flag with 50 stars, and clothes inappropriate for the period.
Suggested correction: The flag shown has 48-stars. Even though I verified it by watching the scene, I know it would be impossible to have 50-stars since there were only 48 US States in 1955. And nothing about the clothing seems "inappropriate."