On this day 250 years ago in London, King George III issued a Proclamation of Rebellion that declared the Colonies in North America in rebellion and commanded
all Our Officers as well Civil as Military, and all other Our obedient and loyal Subjects, to use their utmost Endeavours to withstand and suppress such Rebellion
https://en.wikipedia.org/wiki/Proclamation_of_Rebellion; https://www.americanhistorycentral.com/documents/proclamation-of-rebellion-king-george-iii-text/; https://www.americanhistorycentral.com/entries/olive-branch-petition-facts/
Also on that day in New Hampshire, Royal governor John Wentworth boarded the HMS Scarborough and would never return. New Hampshire was completely independent of British rule
On this day 250 years ago in New York, perhaps at Fort Ticonderoga or maybe at his home near Saratoga, Major General Philip Schuyler wrote to Benjamin Franklin about the plans for invasion of Canada:
The powder which the Respectable Committee of your city has sent is already arrived here. You, and they, Sir, are Equally Intitled to my best thanks for this mark of attention. . . .
it is with pleasure I can inform you 100 [boats] are now able to move about 1300 [men] with Twenty Days Provision, and that we shall very soon make an attempt on St. Johns, weak as we are in Artillery, which I suppose will not Exceed six nine pounders. I have two Flatt Bottomed Vessels amongst those we have Built. They are sixty Feet long and capable of carrying Five Twelve pounders Each, but I can unfortunately mount only one, as I have no Carriages.
Source: “Philip Schuyler to Benjamin Franklin, 23 August 1775,” Founders Online, National Archives, https://founders.archives.gov/documents/Franklin/01-22-02-0108. [Original source: The Papers of Benjamin Franklin, vol. 22, March 23, 1775, through October 27, 1776, ed. William B. Willcox. New Haven and London:: Yale University Press, 1982, p. 180.]
And on this day 250 years ago in Richmond, the Third Virginia Convention adopted an
ordinance for regulating the election of delegates and ascertaining their allowances, and also for regulating the election of committee-men in the several counties and corporations within this colony, and for other purposes therein mentioned
Source: https://lawlibrary.wm.edu/wythepedia/library/ProceedingsOfTheConventionOfDelegates17July1775.pdf