Historical film events of the 1920s

here is the Historical film events of the 1920s


 * in 1920, Triangle changed it's name to Robertson Cole and Svensk Filmindustri was born
 * in 1921, there are majors (Paramount, Brenon, Ukraine, Fox, Goldwyn, First National, and FBO)
 * in 1922, Hollywood's golden era began
 * in 1923, Warner Bros. and Disney are both born. and also, Robertson Cole changed it's name to FBO
 * in 1924, CBC was renamed as Columbia and Goldwyn merged with Metro and Mayer to form Metro-Goldwyn-Mayer
 * in 1925, Universal's pre-2024 films had entered the Public Domain.
 * in 1926, there become the late majors (Paramount, Brenon, Ukraine, Fox, Goldwyn, First National, FBO, and Warner Bros.)
 * in 1927, The Sound era began
 * in 1928, Brenon, Ukraine, and FBO were merged into RKO and First National was sold to Warner Bros.
 * in 1929, Walt Disney decided to make 10 cartoons a year.