Complex sentence: Promoted to adjudant-general Decaen served in the uprising of the Vendée and under the generals Canclaux, Dubayet, Moreau and Kléber.
Split into simpler sentences: Promoted to adjudant-general, Decaen served in the uprising of the Vendée. He fought under the generals Canclaux, Dubayet, Moreau and Kléber.