The Telegraph Trail (1933)

Greedy opportunist Gus Lynch, in order to continue to gouge townsfolk for necessary supplies, convinces High Wolf and his Indian tribe that they need to prevent the completion of the new telegraph lines or their tribe will be wiped out by a new influx of white men. Receiving an incomplete message warning of a white man's involvement in the recent Indian uprisings, cavalry scout John Trent is sent in to rectify the situation.