Washington, who had previously been ordered by…
September 1776 CE
To keep his escape routes open to the north, he places five thousand troops in the city (which at this time only occupies the lower portion of Manhattan), and takes the rest of the army to Harlem Heights.
In the first recorded use of a submarine in warfare, he also attempts a novel attack on the Royal Navy, launching the Turtle in a failed attempt to sink the HMS Eagle, Admiral Howe's flagship.