The Mason-Dixon Line, surveyed by Charles Mason and Jeremiah Dixon, which became a popular name for the dividing line between the slave and free states, is the boundary between which two states of the USA?
Mason–Dixon line use when the Missouri Compromise named "Mason and Dixon's line" as part of the boundary between slave territory and free territory. In popular usage to people from the Northern United States, the Mason–Dixon line symbolizes a cultural boundary between the North and the South (Dixie). However, for many people who identify as Southern, Maryland is not considered a Southern state, leading to confusion over terminology (for more on Maryland's position as southern or northern, see the Region section of the article on Dixie). Originally "Mason and Dixon's Line" referred to the border between Pennsylvania and Maryland. After Pennsylvania abolished slavery,
Mason–Dixon line Mason–Dixon line The Mason–Dixon line, also called the Mason and Dixon line or Mason's and Dixon's line, was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon in the resolution of a border dispute involving Maryland, Pennsylvania, and Delaware in Colonial America. It is still a demarcation line among four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia (originally part of Virginia before 1863). Later it became known as the border between the Northern United States and the Southern United States. Before the Missouri Compromise, the line (west of Delaware) marked the