“Such a flag would be a suitable emblem of our young confederacy, and sustained by the brave hearts and strong arms of the south, it would soon take rank among the proudest ensigns of the nations, and be hailed by the civilized world as THE WHITE MAN'S FLAG.”
Savannah Morning News (28 April 1863); As quoted in Our Flag: Origin and Progress of the Flag of the United States of America https://books.google.com/books?id=vuRCAAAAIAAJ&pg=PA417 (1872), by George Henry Preble, Albany: Joel Munsell, pp. 417–418
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William Tappan Thompson 3
American humorist 1812–1882Related quotes

“Shoot down the Confederacy and uphold the flag; the American flag.”
1860s, What the Black Man Wants (1865)

Who Follow the Flag, Phi Kappa Beta Ode, Harvard University (June 30, 1910).

Savannah Morning News (23 April 1863), As quoted in Our Flag: Origin and Progress of the Flag of the United States of America (1872), by George Henry Preble, Albany: Joel Munsell, pp. 416–417

Brooks D. Simpson. "Simple Questions" https://cwcrossroads.wordpress.com/2015/06/21/simple-questions/ (21 June 2015), Crossroads, WordPress
2010s

Savannah Morning News (4 May 1863); As quoted in History of the Flag of the United States of America (1882), by George Henry Preble, p. 528

James M. McPherson. "The War of Southern Aggression" https://web.archive.org/web/20160317110023/http://www.nybooks.com/articles/1989/01/19/the-war-of-southern-aggression/ (19 January 1989), The New York Review of Books
1980s
Context: To a good many southerners the events of 1861–1865 have been known as 'The War of Northern Aggression'. Never mind that the South took the initiative by seceding in defiance of an election of a president by a constitutional majority. Never mind that the Confederacy started the war by firing on the American flag. These were seen as preemptive acts of defense against northern aggression.

[11 September 2013, We will never concede one drop of our waters to Spain, pledged Picardo on Gibraltar Day, http://en.mercopress.com/2013/09/11/we-will-never-concede-one-drop-of-our-waters-to-spain-pledged-picardo-on-gibraltar-day, MercoPress, 22 March 2014]
Speech to crowds in Casemates Square on Gibraltar National Day 2015.
2013
2010s, On the February 8 Parade and the Olympics (February 2018)

“So we arrived, and planted our flag at the geographical South Pole. Thanks be to God!”
A quote also displayed at the geographical South Pole.