What new methods did advertisers use in the 1920s

They started using billboards i believe hope that helps

With new  insterstate and highways they started using billboards

The native americans, spanish, french and americans all name places in our state. the word “arkansas” came from the quapaw indians, by way of early french explorers. at the time of the early french exploration, a tribe of indians, the quapaws, lived west of the mississippi and north of the arkansas river.