After returning to France, Verdier was employed under Murat for a time in the Cisalpine Republic, then placed in charge of the troops of Etruria. As the campaigns got underway in 1805, Verdier took command of a division of the Army of Italy under Marshal Masséna. During this campaign he was wounded in the crossing of the Adige, and then became commander at Livorno. In February 1806, Verdier was transferred to the Army of Naples where he took command of a division of Reynier's corps. He led this division into the fighting at Campo Tenese, and in July evacuated Cosenza. In March 1807, Verdier left Italy to join Grande Armée, and in May he took command of the 2nd Division of the Reserve Corps under Lannes. After taking part in the fierce fighting of Heilsberg and Friedland, he was rewarded the next year with two honors: Count of the Empire, and Commander of the Iron Crown. Spain was the next campaign for Verdier, and in March 1808 he took command of the 2nd Division of Bessières' corps. After winning at Logrono in June, he was chosen to replace Savary as commander of Aragon and Navarre. Upon taking charge of the siege ofSaragossa, Verdier was wounded and then later lifted the siege. In November he was to join Soult's corps, but instead was directed to command the province of Bilbao. Replacing Reille as commander of a German division, Verdier then took up the siege of Girona in March 1809, and in December he accepted the city's surrender. The month before returning to France in April 1810, Verdier distinguished himself in the fighting around Arenys de Mar. For the next few years, Verdier commanded a division in a corps of observation, which later became Oudinot's II Corps for the Russian campaign. In Russia, he fought at Jaboukowo, Khastitzi, Polotsk, and Swolna, and then at the second battle of Polotsk he was badly wounded. Due to his awful wounds, he was sent back to France and avoided the horrors of the retreat. By May 1813 Verdier was fit enough for duty, and took command of the 4th Infantry Division of the Corps of Observation at the Adige. That September he took command of a corps under Prince Eugene consisting of Rouyer's and Gratien's divisions in the Army of Italy, and was then placed under Grenier. He was wounded by a shot in the combat of Ala in November, but it was not bad enough to put him out of action. In 1814 he took command of a corps consisting of the divisions commanded by Quesnel, Fressinet, and Palombini. In February he fought at the battle of the Mincio and at Borghetto, then in June he returned to France, only to be put on non-activity. However, he was rewarded with a Grand Cross of the Legion of Honor in January 1815. For the Hundred Days, Verdier commanded the 17th Infantry Division of Brune's IX Corps, and was made a Peer of France. He also commanded the 8th Military District. In the chaos after the Waterloo, he prevented Toulon from being plundered. Shortly after Napoleon's abdication, he retired.