Conversation so far:
what were the Napoleonic Wars for Archduke Charles, Duke of Teschen?
In 1797 Archduke Charles, Duke of Teschen arrested the victorious march of General Bonaparte in Italy, and he conducted the retreat of the over-matched Austrians with the highest skill.
What became of Archduke Charles, Duke of Teschen after arresting the victorious march of General Bonaparte in Italy?
In the campaign of 1799 Archduke Charles, Duke of Teschen once more opposed Jean-Baptiste Jourdan, whom he defeated in the battles of Ostrach and Stockach.
What other things happened during the Napoleonic Wars with Archduke Charles, Duke of Teschen besides arresting the victorious march of General Bonaparte in Italy and the 1799 campaign where he once more opposed Jean-Baptiste Jourdan?
In the short war of 1805 Archduke Charles, Duke of Teschen commanded what was intended to be the main army in Italy, but events made Germany the theatre of operations.

Question: what happened with Archduke Charles?
Self-contained rewrite: what happened with Archduke Charles, Duke of Teschen after events made Germany the theatre of operations during the short war of 1805?