Still serving as an I Corps brigadier, he played a role in the Battle of Schleiz on 9 October 1806, clearing a forest of Prussian outposts.
Later, he was in on the defeat and capture of Gebhard Leberecht von Blücher's column in the Battle of Lübeck on 6 November.
In November 1809, Werlé led a Polish division in IV Corps at the decisive French victory at the Battle of Ocaña.
After a bitter firefight with Lowry Cole's British division, Werlé's French soldiers were defeated.
Aside from his military rank, Werlé became a Commander of the Légion d'Honneur on 14 June 1804, and was made a Baron of the Empire on 27 November 1808.