 Complete the following phrase:  In April 1805, he was reinstated again as commander of the 600 men of the expedition of Rear-Admiral Charles René Magon de Médine in Martinique, but never disembarked and returned to France. Protected by Antoine Charles Louis de Lasalle, who found Fournier a good alter ego ready for any and all escapades, he became the commander of his staff and distinguished himself in 1807 in cavalry charges at the battles of Eylau, 