Glenn Williams, author of the award-winning Year of the Hangman: George Washington’s Campaign against the Iroquois will speak at The Chemung County Historical Society (CCHS) June 23 at 7 p.m. at the Chemung County Historical Society, 415 East Water St. in Elmira.

The free public presentation is sponsored by WCNY, Central New York’s public broadcasting organization headquartered in Syracuse, N.Y.

Williams, also senior historian at the U.S. Army Center of Military History – Army Commemoration Office, will present a program on the battles of Newtown and Chemung and the role of those battles in the Washington’s Clinton-Sullivan campaign.

WCNY is producing a documentary on American Revolution battlefields in New York State including the Newtown and Chemung sites. Following the presentation, attendees will be invited to offer their comments and opinions about the advantages and disadvantages of preserving battlefields in their communities. The feedback will become part of the documentary, slated to air on public television in the fall of 2016.

The documentary and Williams’s presentation are funded by a grant from the National Park Service’s American Battlefield Protection Program.