April 18, 1775: Paul Revere, William Dawes, and Dr. Samuel Prescott go on their famous Midnight Ride.
This contemporaneous map was published in 1778 (although this particular copy is a facsimile). It shows British intel regarding “the Rebels Works” in the Boston area in 1775.
Map: Page, Thomas Hyde, Sir, 1746-1821. Boston, its environs and harbour, with the rebels works raised against that town in 1775, from the observations of Lieut. Page of His Majesty’s Corps of Engineers, and from the plans of Capt. Montresor. [London] Wm. Faden, 1778. Ithaca, N.Y., Historic Urban Plans,