This collection of essays examines the impact that the United States entry into WWI had on the people and communities of Central Pennsylvania. The authors in this collection explored how the national events precipitated by American entry into the First World War in April 1917 transformed the institutions and day-to-day life of the men, women, and children living in communities in Central Pennsylvania. Some of the topics explored include WWI's impact on educational institutions (including local universities, the Carlisle Indian Industrial School, and private preparatory schools), the National Guard, the Red Cross, Camp Colt in Gettysburg, conservation efforts, and photojournalism. The narratives included connect these topics to life in Adams, Franklin, and Cumberland Counties, as well as more in depth explorations of activities in Harrisburg, Carlisle, and Gettysburg.