On this episode of Our American Stories the Mason-Dixon Line defined the American house divided between antislavery and pro-slavery Yet this border war was pre-dated by another border battle a colonial-era quarrel which ended only when the area separating Pennsylvania and Maryland's border was surveyed and mapped in the s by the Englishmen Charles Mason and Jeremiah Dixon Here to tell the story is Dakota Bricker who hosts the YouTube channel What In The History Support the show https www ouramericanstories com donate See omnystudio com listener for privacy information [... more]