Little used in American military history, river warfare proved to be a difference-maker when the nation was torn apart by political and social strife.

In retrospect, the American Civil War was inevitable. The conflict’s fundamental issue was human rights, and the basic cause was freedom. But these principles were made real by…

The day after the fall of Richmond, Abraham Lincoln made an astonishing open-air tour of the captured Rebel capital. At great risk to his life, the visit symbolized the…

President-elect Abraham Lincoln made a 10-day train trip from Springfield, Ill. to Washington, D.C. His speeches on the way were intended to show a moderate policy toward the…

Humans have waged wars for millennia, but is war ever justifiable? Just war theorists offer principles that explain when war is justified and how war should be conducted.