Past Meeting

At our public meeting on Sunday, September 16, 2012 the featured presentation was:


A Fortnight In Chester County: The Philadelphia Campaign of 1777

by Sean Moir

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

Sean's presentation established the context of the Philadelphia Campaign within the American Revolution, and used 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

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 Geographic Information Systems (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 to school curriculums.

In addition to his work with Chester County, Sean has done freelance work for the Pencader Heritage Area Association in Delaware, the Battle of Germantown, and 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.

For more information visit or contact Sean at


Page last updated: 2012-09-17 at 16:24 EDT
Copyright © 2006-2012 Tredyffrin Easttown Historical Society. All rights reserved.
Permission is given to make copies for personal use only.
All other uses require written permission of the Tredyffrin Easttown Historical Society.