Don Juan (Canto 8) Lord Byron

O blood and thunder! and oh blood and wounds!
These are but vulgar oaths, as you may deem,
Too gentle reader! and most shocking sounds:
And so they are; yet thus is Glory's dream
Unriddled, and as my true Muse expounds
At present such things, since they are her theme,
So be they her inspirers! Call them Mars,
Bellona, what you will—they mean but wars.

All was prepared—the fire, the sword, the men
To wield them in their terrible array.
The army, like a lion from his den,
March'd forth with nerve and sinews bent to slay,—
A human Hydra, issuing from its fen
To breathe destruction on its winding way,
Whose heads were heroes, which cut off in vain
Immediately in others grew again.

History can only take things in the gross;
But could we know them in detail, perchance
In balancing the profit and the loss,
War's merit it by no means might enhance,
To waste so much gold for a little dross,
As hath been done, mere conquest to advance.
The drying up a single tear has more
Of honest fame, than shedding seas of gore.