Mar ‧ seil ‧ laise /ˌmɑːseɪˈez $ ˌmɑːr-/ BrE AmE noun
[ Date: 1800-1900 ; Language: French ; Origin: 'of Marseilles, city on the south coast of France' ; because the song was popular among soldiers based in Marseilles ]
the Marseillaise the national song of France