Shortly after the Tennessee General Assembly passed legislation authorizing the creation of Union County, Knox County secured an injunction blocking the creation of the new county, which would take some of its area from Knox County. To defend the new county, its supporters retained the services of Horace Maynard (1814–1882), a Knoxville-area attorney and later U.S. Postmaster General. After Maynard successfully defended the new county in litigation proceedings, Liberty was renamed "Maynardville" in his honor. Union County was formally recognized in 1856.