Cresap's War

Cresap's War
Map showing the area disputed between Maryland and Pennsylvania during Cresap's War
Date 1730–1767 Location Pennsylvania–Maryland border Result Military stalemate Establishment of the Mason–Dixon line
Belligerents
Colony of Pennsylvania	Colony of Maryland
Commanders and leaders
Patrick Gordon John "the American" Penn Samuel Smith	Thomas Cresap Charles Calvert, 5th Baron Baltimore Samuel Ogle Col. Nathaniel Rigby unnamed Sheriff of Baltimore
Strength
militia	militia

Cresap's War (also known as the Conojocular War, from the Conejohela Valley where it was mainly located along the south bank) was a border conflict between Pennsylvania and Maryland fought in the 1730s. Hostilities erupted in 1730 with a series of violent incidents prompted by disputes over property rights and law enforcement. The conflict escalated through the first half of the decade, culminating in the deployment of military forces by Maryland in 1736 and by Pennsylvania in 1737. The armed phase of the conflict ended in May 1738 with the intervention of King George II, who compelled the negotiation of a ceasefire. A final settlement was not achieved until 1767 when the Mason–Dixon line was recognized as the permanent boundary between the two colonies.^[1]