What were the biggest changes in the movie industry in the 1920s?

1. The use of advertising posters.

2. The move to New York as the center of the movie making industry in the USA.

3. The introduction of color.

4. The introduction of sound.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

b. the 200th birthday of the united states