Kenneth W. Phifer has preached a number of sermons on
war, peace, violence and nonviolence across the years.
Some are dated in illustrations but not in ideas.

War and Peace (2 sermons)
Peace
The Choice of Violence
The Power of Non-Violence
War for Peace  (January 1991)
Is there a Moral Equivalent to War
A Plea for Peace - A Plan for Peace
War, Peace, and Religion  (March 2003)