How did the growth of the railroads contribute to the decline of the native americans

Answer 1

WELL IT FORCED THE NATIVES TO MOVE WEST AND IT ALSO KILLED THE BUFFALO IN WHICH THE BUFFALO WAS THE BASIC WAY OF LIFE FOR THE NATIVES THEY USED THE BUFFALOS FOR CLOTHS FOOD ETC

Answer 2

As it became easier for white settlers to move into native American territory, they took over native lands and disrupted the game that natives hunted and ate.

Check these sites for more information.

http://en.wikipedia.org/wiki/First_Transcontinental_Railroad

http://www.city-data.com/us-cities/The-West/Billings-History.html