well, as far as I know, the Swedish soldiers who died in 1660 during the assault on Copenhagen are buried under the Chinese tower in Tivoli. The final battle took place where Tivoli is now. If I am wrong, it is still a good story. And as far as the proposal about tending the battle fields in Europe is concerned, well, will there be much ground left where there was not a battle? Just think of Lützen: in 1632 the Swedes fought there (Gustav Adolpg died there) and in 1813 Napoleon won a battle there. Evidently Europe was running out of places where to fight.
There is a fine monument for all our dead soldiers below the arc of triumph in Paris. Even the Germans respected itg in 1940 marching around the arch and not through it.