Norwich — New technologies of warfare unleashed during World War I and efforts to create international laws to protect civilians from the calamities of war will be discussed Tuesday during the final talk in the fall lecture series sponsored by the Norwich World War I Memorial Committee.

Burrus M. Carnahan, a foreign affairs officer in the Bureau of International Security and Nonproliferation at the U.S. Department of State, will speak at 7 p.m. in the parlor of Park Congregational Church, 283 Broadway. The program is free and open to the public. Light refreshments will be served. The church parlor is on the Crescent Street side of the building, across from Norwich Free Academy, and is accessed by a blue, street-level door.

Carnahan’s talk, “World War I and the Development of International Law,” will address the challenge new technologies of warfare presented to international efforts to create rules protecting civilians and military in war.

An authority on the law of war, Carnahan has written “Act of Justice: Abraham Lincoln’s Emancipation Proclamation and the Law of War,” and “Lincoln on Trial: Southern Civilians and the Law of War.” A professional lecturer on law at George Washington University, Carnahan is a member of the Lincoln Forum and author of a guide to Lincoln sites in the Washington, D.C., area.

“This is our final program in our fall series on World War I,” said Norwich City Historian Dale Plummer and chairman of the Norwich World War I Memorial Committee. “We feel this is a wonderful opportunity to explore the legal, ethical and moral issues confronting the world as a result of the First World War.”