Congress passed several Reconstruction Acts. Congress overrode a presidential veto of an act that divided the South into military districts and placed the former Confederate states under martial law pending their adoption of constitutions guaranteeing civil liberties to former slaves.
Ohio does not apply its sales tax to sales of goods to churches, charities, schools, colleges, universities, government agencies, public utility companies, restaurants, cafeterias, farmers, ranchers, food processors, commercial fishermen and volunteer fire departments.
What states DON'T have a sales tax. There are five states that have no state-wide sales and use tax: Alaska. Oregon. Montana. New Hampshire. Delaware. This is not terribly useful information unless you're in those states (and therefore already know that there's no tax).