From 1810 to 1812, the city was the second state capital of Ohio. The National Road courses through Zanesville as U.S. Route 40. The city grew quickly in the 1820s–1850s. The city and the city of Putnam (eastern side of Muskingum River) from the 1840s until the Civil War broke out was part of the 'Underground Railroad'. In excess of 5,000 Union soldiers, along with hundreds of townsfolk, were stationed in the Zanesville area to protect the city in 1863 during Morgan's Raid.