A Fortnight in Chester County … The Philadelphia Campaign of 1777

Sean Moir presents a program describing Revolutionary War troop movements in Chester and Delaware Counties. Known as the Philadelphia Campaign, this included three battles within two weeks: the Battle of Brandywine, the Battle of the Clouds, and the Paoli Massacre.

Sean’s presentation establishes the context of the Philadelphia Campaign within the American Revolution, and uses unique animated maps to help tie these events to local sites.

As part of a multi-award winning county project, sponsored in part by the National Park Service and the American Battlefield Protection Program (ABPP), Sean has worked for the last three years researching, mapping, and animating the conflicts of the 1777 Philadelphia Campaign, specifically the Battle of Brandywine and the Paoli Massacre.

Sean Moir is owner and president of Western Heritage Mapping in Valley Forge. After graduating from Penn State University with an Information Technology degree, Sean worked as a software developer, and in 2007 joined Chester County as a GIS Analyst. Since 2009 Sean has sought and received multiple grants from the ABPP to research and document revolutionary war battles in Chester County. Combining his software and GIS skills with his personal interest in history, Sean creates groundbreaking animated battle maps, which have been presented to audiences across the region and are now being incorporated into school curriculums, and are on display at museums.

In addition to his work in Chester County, Sean has done work for the Pencader Heritage Area Association in Delaware (site of the Battle of Cooch’s Bridge), the Clivden House in Germantown (site of the Battle of Germantown) and the Friends of Valley Forge Park. Sean currently has an animated map on exhibit at the American Swedish Heritage Museum showing the growth and development of the New Sweden settlements in the 17th Century.