Summary
Declared an outlaw by the Congress of Vienna, Napoleon
did what he always did  when he was in trouble: he went on the offensive.
 With his newly raised army,  he attacked Belgium, where the British and
Prussian armies were camped.  His  hope was that he could separately
destroy these armies before the Russians and  Austrians arrived.
 The British army was commanded by the Duke of Wellington  and the
Prussian army was commanded by Marshal Gebhard Blucher.  The French
 army engaged the Prussians first at Ligny, on June 16, 1815.  The
battle was  indecisive, and both sides regrouped.
Napoleon decided next to attack the English, then at Waterloo,
a village  near Brussels.  On June 18 1815, the British, aided by
the Prussians, defeated  Napoleon for the last time.  Their victory
signaled the end of a more-than-ten- year period filled with battles largely
instigated by Napoleon.  Napoleon's  Hundred Days were rapidly coming
to an end.
Napoleon abdicated on June 22, 1815, hoping that his son would
rule France.  He  tried to board a ship for the United States, but
the British Navy foiled him  again, preventing any ships from leaving
the port where Napoleon intended to  embark from.  Napoleon, afraid
of execution at the hands of a restored Louis  XVIII, then asked
the British to protect him.  He hoped to perhaps go back to  Elba,
where he had been reasonably happy.  But Britain would never make
that  mistake again, and sent him to the remote island of Saint
Helena, in the  South Pacific.  Napoleon protested his sentence wildly,
but there was nothing he  could do.  On October 15, 1815, Napoleon
left for the South Atlantic.  Only a  handful of friends accompanied
him this time.
On Saint Helena, Napoleon lived at Longwood Manor, previously
home to the  lieutenant governor of the island.  The former emperor
was given freedom to move  about, although he had to be accompanied
by an English officer at all times.   Napoleon became depressed,
usually slept late and never went outdoors.  He  worked on his memoirs,
called the Memorial de Sainte-Helena.  His life
 was fairly boring, especially for someone who had lived as exciting
an existence  as Napoleon.  With no hope of a return to Europe,
he lived out his last years in  a reclusive existence following
a very repetitive daily routine.
By 1817, Napoleon's health was declining, and he wrote
a will requesting that  his ashes be strewn on the banks of the
Seine, "in the midst of the French  people which I have loved so
much."  Napoleon died on May 5, 1821.
At Waterloo, Napoleon had 72,000 troops, Wellington commanded
68,000 troops, and  Blucher 45,000.  The ground was muddy on the
day of the battle, and Napoleon  made the critical mistake of waiting
for the ground to dry before attacking  Wellington's forces in the
afternoon.  This delay allowed Blucher's forces to  reach Waterloo
in time to make a difference in the outcome of the battle.  While
 the French made assault after assault on the British, they were
slow to make  progress, and Blucher's Prussians advanced against
the French army's eastern  flank.  Marshal Ney, one of Napoleon's
best commanders, orchestrated a combined  attack of soldiers and
artillery, and came very close to breaking Wellington's  line. 
However, Napoleon could not reinforce Ney's attack, since he was
forced  to divert a large number of troops from fighting the British,
including his  crack Imperial Guard, in order to face the Prussians.
  In the confusion, the  French army was overrun, and fled in disorder.
 25,000 French soldiers died,  while 8,000 were taken prisoner.
 15,000 British and 7,000 Prussians died.   Napoleon reportedly
joined one of his retreating regiments, dismounted, and  walked among
them, weeping that France had lost and that he had not been killed
 in the battle.  Napoleon's military career was over.