The factors led to the closing of the frontier are :
To curb the activities of the cowboys there are many measures that was put in to play which actually brought an end to them.
It should be noted that the Cowboys played an essential role as regards the ranching industry through the activities of driving cattle across the open range , however this can be seen as far as the mid-19th century.
With the invention of barbed wire fencing as well as the increased privatization of land, followed by the growth of the railroad has been a great factor in bringing a stop to the cowboys' way of life.
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