Who sang and dance for the troops during world war 1?

During World War I, various entertainers, including notable figures like the American singer and actress Irene Castle, performed for troops to boost morale. Additionally, the famous song-and-dance duo, the "Ziegfeld Follies," along with other performers from vaudeville and music halls, also entertained soldiers. These performances were vital in providing a sense of normalcy and joy amid the hardships of war.