Coming Starting on page 158 of *The Portable Nietzsche in Thus Spoke Zarathustra: First Part, Nietzsche writes:
ON WAR AND WARRIORS
[. . .] My brothers in war, I love you thoroughly; I am and I was of your kind. And I am also your best enemy. So let me tell you the truth!
I know of the hatred and envy of your hearts. You are not great enough not to know hatred and envy. Be great enough, then, not to be ashamed of them. [. . .]
You should have eyes that always seek an enemy—your enemy. And some of you hate at first sight. Your enemy you shall seek, your war you shall wage—for your thoughts. And if your thought be vanquished, then your honesty should still find cause for triumph in that. You should love peace as a means to new wars—and the short peace more than the long. To you I do not recommend work, but struggle. To you I do not recommend peace, but victory. Let your work be a struggle. Let your peace be a victory! [. . .]
You say it is the good cause that hallows even war? I say unto you: it is the good war that hallows any cause. War and courage have accomplished more great things than love of the neighbor.  Not your pity but your courage has so far saved the unfortunate.
"What is good?" you ask. To be brave is good.  [. . .]
Recalcitrance—that is the nobility of slaves. Your nobility should be obedience. Your very commanding should be an obeying.  To a good warrior "thou shalt" sounds more agreeable than "I will." And everything you like you should first let yourself be commanded to do.
Your love of life shall be love of your highest hope; and your highest hope shall be the highest thought of life.  Your highest thought, however, you should receive as a command from me—and it is: man is something that shall be overcome. 
Thus live your life of obedience and war. What matters long life? What warrior wants to be spared?  I do not spare you; I love you thoroughly, my brothers in war!
Thus Spoke Zarathustra.