Taupin led a brigade in Julien Augustin Joseph Mermet's division at the Battle of Fuentes de Oñoro on 3–5 May 1811. The brigade comprised the 1st, 2nd and 4th Battalions of the 50th and 59th Line Infantry Regiments and was part of Louis Henri Loison's VI Corps. Mermet's division was part of Masséna's flank attack on 5 May. This turned the Allied right flank, but Arthur Wellesley, Viscount Wellington placed his right flank in a new position which Massena did not attack. In the summer of 1812, Taupin called his officers together at a village church and lectured from the pulpit about the overuse of horses and mules in the infantry. The veteran recalled that in 1793 he had a haversack to carry his belongings and a stone for a pillow. He railed against officers keeping riding horses and using too many mules to carry their baggage. Ironically, Taupin himself had six mules to carry his personal baggage.