Complex sentence: Plessier is sometimes considered the first French general to be killed during the war; although four other generals pre-deceased him (Raffenel, Rondony, Diou and Deffontaines), Plessier received his mortal wound first.
Split into simpler sentences: Plessier is sometimes considered the first French general to be killed during the war. Although four other generals pre-deceased him (Raffenel, Rondony, Diou and Deffontaines) Plessier received his mortal wound first.