What did the relationship between ranchers and farmers changed significantly with the invention of?

The relationship between ranchers and farmers changed significantly with the invention of barbed wire in the late 19th century. This innovation allowed farmers to enclose their fields, protecting crops from free-ranging livestock and reducing conflicts over land use. As a result, ranchers could no longer let their cattle roam freely, leading to tensions over grazing rights and land boundaries. Ultimately, this shift contributed to the transformation of the American West, as ranchers and farmers adapted to new agricultural practices and territorial claims.