On this day 250 years from his headquarters in Cambridge, Massachusetts, General George Washington reported to John Hancock, the President of the Continental Congress that:

When I had the honor to address you the 19th Instt upon the evacuation of the Town of Boston by the Ministerial army, I fully expected as their retreat and embarkation were hurried and precipitate, that before now they wou’d have departed the harbour, and been far in their passage to the place of destination: But to my surprize and disappointment the Fleet is still in Nantasket road. The purpose inducing their stay, is altogether unknown, nor can I suggest any satisfactory reason for It; On Wednesday night last before the whole of the Fleet fell down to Nantasket, they demolished the Castle & Houses belonging to It by burning them down, and the several Fortifications—they left a great number of the Cannon, but have rendered all of them, except a very few, entirely useless by breaking off the Trunnions, and those they spiked up, but may be made serviceable again; some are allready done

Sources: “George Washington to John Hancock, 24 March 1776,” Founders Online, National Archives, https://founders.archives.gov/documents/Washington/03-03-02-0390-0001. [Original source: The Papers of George Washington, Revolutionary War Series, vol. 3, 1 January 1776 – 31 March 1776, ed. Philander D. Chase. Charlottesville: University Press of Virginia, 1988, pp. 522–525.];

On this day 250 years ago in Paris, France, Jacques Barbeu-Dubourg wrote to Benjamin Franklin to recommend a volunteer from France, Gilles-Jean Barazer de Kermorvan, to the Continental Army:

I very seriously think that the Chevalier de Kermorvan is one of the best Men your Country can acquire, he has already embraced its sentiments, and neither demands nor has the ambition of obtaining any Rank, untill his Zeal and talents have been experienced. He is even willing to devote himself to all dangers as a simple Volunteer with as good and Chearfull a Will as if he had the cheif Command, besides he appears to me well instructed in the Military Art 

Kermorvan would arrive in America in June and be commissioned as a Lieutenant Colonel in the Continental Army’s Corps of Engineers. He managed the construction of fortifications on the Delaware River and designed fortifications at other locations on the Atlantic Coast before joining Daniel Morgan’s Riflemen and serving heroically at Saratoga. Lt. Col. Kermorvan would return to France in 1778.

Sources: “Jacques Barbeu-Dubourg to Benjamin Franklin, [24 March 1776]: extract,” Founders Online, National Archives, https://founders.archives.gov/documents/Franklin/01-22-02-0232. [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, pp. 390–391.]; https://fr.wikipedia.org/wiki/Gilles_Jean_Marie_Barazer_de_Kermorvan