“Then join hand in hand, brave Americans all!
By uniting we stand, by dividing we fall.”

Last public speech before his death (4 March 1799); as quoted in Patrick Henry: Life, Correspondences and Speeches (1891) by William Wirt Henry, Vol. 2, p. 609-610 http://www.archive.org/stream/pathenrylife02henrrich#page/608/mode/2up <br class="br">1790s, Speech (1799) <br class="br">Context: Let us trust God and our better judgment to set us right hereafter. United we stand, divided we fall. Let us not split into factions which must destroy that union upon which our existence hangs. Let us preserve our strength for the French, the English, the Germans, or whoever else shall dare invade our territory, and not exhaust it in civil commotions and intestine wars.

The Flag of our Union, reported in Bartlett's Familiar Quotations, 10th ed. (1919).

Cardinal Francis Spellman used this attribution in his speech to the 1954 National Convention of the American Legion. It has been debunked repeatedly, for example in They Never Said It (1999) by Paul F. Boller and John H. George. The last two sentences have also been misattributed to Nikita Krushchev. The metaphor of the ripe fruit appears much earlier in US policy discussions about Cuba:
If an apple, severed by the tempest from its native tree, cannot choose but fall to the ground, Cuba, forcibly disjoined from its unnatural connexion with Spain, and incapable of self-support, can only gravitate towards the North American Union.
John Quincy Adams, letter to Hugh Nelson (28 April 1823)
The fruit will fall into our hands when it is ripe, without an officious shaking of the tree. Cuba will be ours … in due season, without the wicked impertinence of war.
Parke Godwin, "Annexation" (February 1854)
Misattributed

"A Song of Spring and Autumn".

Though Lafayette, himself a Roman Catholic, might conceivably have said something translatable as this, the earliest source yet found for this is an anti-catholic pamphlet The Future Conflict : An Address, (1878), by Order of the American Union, p. 20, without any citation of original sources. It has also been quoted as: "If the liberties of the American people are ever destroyed, they will fall by the hands of the clergy."
Disputed

Nets to Catch the Wind (1921), A Crowded Trolley Car

Berndt reicht mir eine Ausarbeitung über die von uns zu betreibende okkultistische Propaganda ein. Hier wird in der Tat Einiges geleistet. Die Amerikaner und Engländer fallen ja vorzüglich auf eine solche Art von Propaganda herein. Wir nehmen alle irgendwie zur Verfügung stehenden Kronzeugen der okkulten Weissagung als Mithelfer in Anspruch. Nostradamus muß wieder einmal daran glauben.
Dated 19 May 1942 concerning the use of Nostradamus's famous "Hister" quatrain
as displayed and translated in Nazis: The Occult Conspiracy, Discovery Channel
Diary excerpts

Source: Richard III