Cumberland County exchanged land with York County

York County formed from Lancaster

King George’s War

In May 1737 Pennsylvania ambassadors traveled to Annapolis and negotiated a truce with the Maryland governor.  The truce was solidified by an order in council in August calling on both the Pennsylvania and Maryland governors to prevent further disturbances.  The next year a second order in council decreed a temporary border between the two colonies  … Read more

Lancaster formed from Chester County

Delaware becomes independent of Pennsylvania.

Queen Anne’s War

King William’s War

New Castle gained land

Philadelphia counties established