“With a soldier the flag is paramount. I know the struggle with my conscience during the Mexican War. I have never altogether forgiven myself for going into that. I had very strong opinions on the subject. I do not think there was ever a more wicked war than that waged by the United States on Mexico. I thought so at the time, when I was a youngster, only I had not moral courage enough to resign. I had taken an oath to serve eight years, unless sooner discharged, and I considered my supreme duty was to my flag. I had a horror of the Mexican War, and I have always believed that it was on our part most unjust. The wickedness was not in the way our soldiers conducted it, but in the conduct of our government in declaring war. The troops behaved well in Mexico, and the government acted handsomely about the peace. We had no claim on Mexico. Texas had no claim beyond the Nueces River, and yet we pushed on to the Rio Grande and crossed it. I am always ashamed of my country when I think of that invasion. Once in Mexico, however, and the people, those who had property, were our friends. We could have held Mexico, and made it a permanent section of the Union with the consent of all classes whose consent was worth having. Overtures were made to Scott and Worth to remain in the country with their armies.”

Ira Levinson, Chapter 5 Ira, p. 74
2009, The Longest Ride (2013)

Speech in the House of Commons (10 June 1806) on the Abolition of the Slave Trade, quoted in J. Wright (ed.), The Speeches of the Rt. Hon. C. J. Fox in the House of Commons. Volume VI (1815), p. 659.
1800s

[Szent-Györgyi, Albert, The Crazy Ape: Written by a Biologist for the Young, 1970, 20-21, The Universal Library Crosset & Dunlap, A National General Company, New York, https://archive.org/details/isbn_0448002566, July 24, 2017, Internet Archive]

On the morality of the firebombing campaign http://www.pbs.org/wgbh/amex/bomb/peopleevents/pandeAMEX61.html)

Source: 1880s, Personal Memoirs of General U. S. Grant (1885), Ch. 67.
Context: I had known General Lee in the old army, and had served with him in the Mexican War; but did not suppose, owing to the difference in our age and rank, that he would remember me, while I would more naturally remember him distinctly, because he was the chief of staff of General Scott in the Mexican War.
When I had left camp that morning I had not expected so soon the result that was then taking place, and consequently was in rough garb. I was without a sword, as I usually was when on horseback on the field, and wore a soldier's blouse for a coat, with the shoulder straps of my rank to indicate to the army who I was. When I went into the house I found General Lee. We greeted each other, and after shaking hands took our seats. I had my staff with me, a good portion of whom were in the room during the whole of the interview.
What General Lee's feelings were I do not know. As he was a man of much dignity, with an impassible face, it was impossible to say whether he felt inwardly glad that the end had finally come, or felt sad over the result, and was too manly to show it. Whatever his feelings, they were entirely concealed from my observation; but my own feelings, which had been quite jubilant on the receipt of his letter, were sad and depressed. I felt like anything rather than rejoicing at the downfall of a foe who had fought so long and valiantly, and had suffered so much for a cause, though that cause was, I believe, one of the worst for which a people ever fought, and one for which there was the least excuse. I do not question, however, the sincerity of the great mass of those who were opposed to us.

To Leon Goldensohn, April 14, 1946, from "The Nuremberg Interviews" by Leon Goldensohn, Robert Gellately - History - 2004

Politique intérieure, je fais la guerre; politique extérieure, je fais la guerre. Je fais toujours la guerre.

"Discours de Guerre" [Speech on War] Chambre des Députés, Assemblée Nationale, Paris (8 March 1918)

Testimony to the Inquisition, (1573)

As quoted in "Top Salary Vision of Clemente Dims; Subpar Season Hurts" https://news.google.com/newspapers?id=3q4nAAAAIBAJ&sjid=Y2wDAAAAIBAJ&pg=4117,4986463 by Charley Feeney, in The Pittsburgh Post-Gazette (Friday, September 27, 1968), p. 23
Baseball-related, <big><big>1960s</big></big>, <big>1968</big>