Hallo Armin,
You said:-
<<His name was Georg Heinrich von Hattorff he was one of the
nobled line of our family. He was fighting at Salamancar and Waterloo
against Napoleon. He was a captain or in those days they called him "Rittmeister"
what is the same like Captain.>>
It is evident G.H. Von Hattorff (or his father) bought a commission (paid
money to be an army officer). He would have bought his own horses and
uniform and sword. He will probably not have been the oldest son and
therefore would not inherit any land - an army career would have allowed him
to mingle in the upper classes of society and gain a rich bride 
<<The secret is why did Johann August disband in 1824 most of his comrads
are disbandes in about 1816 after Waterloo. >>
This man was not a commissioned officer - he belonged to the 'other ranks'.
He may have been 'conscripted' by the army for 2 years and signed on for
another 10 years. Or, if there was no work in his homeland, he may have
chosen an army career and signed on as a 'regular soldier' for 5, 10 or 15
years. He did very well to rise up in the ranks from private, to corporal
to sergeant -maybe he got his promotion stripes during battle. The other
men who went home in 1816 were mostly low rank privates and they would not
be paid much money. We have to ask ourselves if he was a well paid
craftsman in civilian life or did he earn more money as a sergeant in the
army.
<<But with your help i have now the adresses of the
curches in Uxbridge. I am sure that Frederick August is born there. The
first born children of Johann August were born in England the next two in
Germany.
The secret is why did Johann August disband in 1824 most of his comrads are
disbandes in about 1816 after Waterloo. >>
Have you visited this 'rootschat' website? On the 'Middlesex' page there
are some "Resources" which you can look through.
When you have seen them maybe somebody on this "Middlesex Look Up REQUESTS"
board can help you? Go to the bottom of this page, click on "NEW TOPICS"
and make your request:-