Who said "The Union must be preserved, or all is lost."?

This quote is attributed to William Tecumseh Sherman.

The Union must be preserved, or all is lost. - William Tecumseh Sherman

"The Union must be preserved, or all is lost."

William Tecumseh Sherman Hope

Military General American 1820–1891

"War is cruelty, and you cannot refine it."

"I am tired and sick of war."

"You cannot qualify war in harsher terms than I will."

"There is many a boy here today who looks on war as all glory, but boys, it is all hell."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."