Rubuta ci gaba ga wannan sakin layi - A lokacin yakin na hudu Coalition
, Marulaz ya jagoranci rundunar sojan doki a yakin Golymin a ranar 26 ga Disamba, 1806. A Yaƙin Eylau a ranar 8 ga Fabrairu 1807, ya jagoranci Brigade na Sojoji na III na Marshal Louis Davout. A karkashin umarninsa sune 1st da 12th Chasseurs à Horse Regiments, an sanya 2nd Chasseurs zuwa wasu ayyuka. Da farko sojojinsa sun rufe ci gaban sashin Louis Friant, sannan suka kori wasu Cossacks. Marulaz ya dauki matsayi na tsare gefen dama kuma ya kori harin da dakarun Rasha suka kai. Ya shiga cikin gwagwarmaya mai zafi don mallakar ƙauyen Klein Sausgarten. A lokacin da Davout ya ci gaba, Marulaz ya kare gefen dama na III Corps. A ƙarshen rana, sojojinsa sun kai hari a kusa da ƙauyen Kutschitten kuma suka koma tare da sauran sojojin Davout. 12th Chasseurs na brigade ya kasance a yakin Heilsberg a ranar 10 ga Yuni 1807.