Olivier Charles Armand Adrien Mazel (16 September 1858 – 10 March 1940) was a French Army general during World War I. He commanded the First (25 March 1916 – 31 March 1916) and Fifth Armies (31 March 1916 - 22 May 1917) during the war. One of General Robert Nivelle's appointments he was removed from command of the Fifth Army by General Émile Fayolle.
Decorations Légion d'honneur Knight (11 July 1898) Officer (12 July 1911) Commander (13 July 1915) Médaille Interalliée de la Victoire Médaille Commémorative de la Grande Guerre Médaille Coloniale with "Tunisie" bar Distinguished Service Medal (US) Companion of the Order of the Bath (UK)
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