The American Revolution functionally ended when a joint American and French army surrounded and forced the surrender of General Cornwallis at the Battle of Yorktown. The Boston Tea Party and many of the other events leading to the start of the American Revolution were protests against the Townshend Acts, which were drafted by Chancellor of the Exchequer Charles Townshend to make of lost revenue resulting from a 25% reduction in the tax on agricultural land in Great Britain to curry favor with the lower gentry upon whose electoral support the then current government depended.
**I learned today that General Cornwallis's mother was the eldest child of the second Viscount Townshend**, the famous "Turnip" Townshend whose popularizing of the Norfolk System of Four Field Crop Rotation dramatically increased crop yields in Britain and likely played a significant role in kicking off the industrial revolutions. This is significant because Charles Townshend of the Townshend Acts was the second son of the third Viscount Townshend, who was the second child and eldest son of the second Viscount. Therefore, the man who lost the American Revolution was the first cousin of the man who did more to cause the American Revolutions than nearly any other man.
For added color, the second son (and third child) of the second Viscount Townshend was the father of Thomas Townshend, who served as Home Secretary under Pitt the Younger after the American Revolution. In that capacity, he enacted a plan to deport British criminals to the far side of the world. For his service to the nation, he was elevated to the House of Lords initially through the third creation of an extinct title as the Baron Sydney and was later elevated again to become the first Viscount Sydney.
So three first cousins, who were all the grandsons of one of the most important (but largely forgotten) figures of modern history, started the American Revolution, lost the American Revolution and then responded to the loss of the American Revolution by leading the creation of Australia.
For bonus points, the second Viscount Townshend outlived the grandmother of these three men, and his second wife was the sister of his long time political ally Robert Walpole, the first Prime Minister of Great Britain and the man who donated #10 Downing Street to serve as the Prime Minister's residence.