of Orange came to the throne and established the Protestant faith in England, Maryland outlawed Catholicism. This lasted until after the American Revolutionary War . Wealthy Catholic planters built chapels on their land to practice their religion in relative secrecy. The conflict led to the Cresap's War (also known as the Conojocular War), 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, and 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 cease-fire. A provisional agreement had been established in 1732. [ 49 ] Negotiations continued until a final agreement was signed in 1760. The agreement defined Maryland's border with what is now Delaware as well as Pennsylvania. The border between Maryland and Pennsylvania was defined as the line of latitude 15 miles (24 km) south of the southernmost house of Philadelphia, a line now known as the Mason-Dixon Line . Maryland's border with Delaware was based on a Transpeninsular Line and the Twelve-Mile Circle around New Castle. [ 49 ] After Virginia made Anglicanism the established religion in the colony, numerous Puritans migrated from Virginia to Maryland. They were given land for a settlement called Providence (now Annapolis). St. Mary's