A barbed wire fence is a type of fencing that consists of wire strands with sharp edges or points, designed to deter animals and people from crossing. It is commonly used in agricultural settings to contain livestock and protect crops. The barbs are spaced at regular intervals along the wire, making it difficult to climb or cut through. Invented in the late 19th century, barbed wire became popular in the United States during the Westward Expansion. It played a significant role in shaping the landscape of ranching and farming, allowing for the establishment of property boundaries and reducing conflicts over land use.