Unlike the successful Siege of Boston, the efforts to defend the city of
 New York ended in near disaster for the Continental Army and the cause 
of independence. 
In what proved to be the largest battle of the 
Revolutionary War in terms of total combatants, Washington’s forces on 
August 22, 1776, were flanked out of their positions atop the Gowanus 
Heights (part of today’s modern Brooklyn) and soundly defeated by 
William Howe's roughly 20,000 man force on Long Island.
It was during these dark days at the close of 1776 that Thomas Paine’s words from the recently published American Crisis rang most true:
“These are the times that try men’s souls…the summer soldier and the sunshine patriot will, in this crisis, shrink from the service of their country; but he that stands it now deserves the love and thanks of man and woman.”
Washington’s smallpox inoculation program was one of his best decisions of the war.
Up until modern times, disease, not bullets, bayonets, or cannon fire, had been the great killer of soldiers in all armies. In 1775, smallpox had so devastated the American army in Canada that John Adams bemoaned that “…smallpox is ten times more terrible than the British, Canadians and Indians together.”
In late May 1781 Washington’s situation and the fate of the American 
cause began to rapidly improve. Comte de Rochambeau, the commander of 
the French troops in America, informed Washington that France had made a
 6,000,000 livre gift to the Continental Army. 
It was the news that 
Rochambeau did not initially share with Washington that made an even 
bigger impact. The French fleet, now operating in strength in North 
American waters, had been secretly directed to the Chesapeake and a real
 opportunity to defeat Cornwallis’ force now existed. 
Washington, who 
had been stubbornly fixated on attacking the British base at New York 
City, rallied to Rochambeau’s plan and moved his army south to Virginia.
 On September 5, 1781, the French fleet under the command of Admiral de 
Grasse drove off the British fleet sent to relieve Cornwallis. The trap 
was now set. The siege of Yorktown began on September 28, 1781, and 
ended with a Franco-American victory on October 19, 1781 – the decisive 
battle of the Revolutionary War.
Great quotes from George Washington
“Associate yourself with men of good quality, if you esteem your own 
reputation; for ‘tis better to be alone than in bad company.” — George 
Washington
“Let us therefore animate and encourage each 
other, and show the whole world that a Freeman, contending for liberty 
on his own ground, is superior to any slavish mercenary on earth.” — 
George Washington 
“Few men have virtue to withstand the highest bidder.” — George Washington
