Here's the quote in full:
"War is at best barbarism. . . .Its glory is all moonshine. It is only those who have neither fired a shot nor heard the shrieks and groans of the wounded who cry aloud for blood, more vengeance, more desolation. War is hell."

The speaker is William Tecumseh Sherman, West Point graduate, and the Union general who cut a wide swath across Georgia in the Civil War, sparing nothing, as he understood that the civilian support was essential to the Confederate war effort. The Civil War, as waged by Sherman, was the first "modern" war. The occasion was his address to the graduates of the Michigan Military Academy, June 19, 1879.

As I looked it up in Bartlett's Familiar Quotations, my eye happened to scan across the gutter to the opposite page, where I saw this:

"I started with this idea in my head, 'There's two things I've got a right to . . . death or liberty.'"

The speaker? Harriet Tubman, escaped slave and conductor on the Underground Railroad, to her biographer, ca. 1868.

Regards--
Mary Anne