.[2]àDuring all the Song Festivals from 1947 to 1985, the Soviet occupation authorities forced Soviet and communist songs into the repertoire. For example, it was mandatory in all events to perform theàstate anthems of USSRàandàEstonian SSR,àThe Internationale, along with songs mandatorily glorifying the SovietàCommunist Partyàand its leadersàLeninàandàStalin. Because of the inclusion of children's and boys' choirs, the total number of participants rose to 25,000 â 30,000 people.