French diplomat and statesman whose belligerent attitudes as foreign minister in 1870 helped push France, then diplomatically isolated and militarily unprepared, into a disastrous war with Prussia.

Gramont was a member of an old aristocratic family. He served with some merit in a variety of diplomatic posts during the Second Empire. He supported French intervention in Italy in 1860 and urged a French–Austrian alliance to head off Prussia.

Gramont became foreign minister in May 1870. His general hostility toward Prussia led him to a position of strong opposition toward the candidacy of a German prince for the Spanish throne. The bellicose telegram sent to the Prussian king, William I (July 12, 1870), demanding that Prussia renounce the candidacy, was in large part Gramont's work. When William refused and informed Chancellor Bismarck, Bismarck published a shortened, warped version of the correspondence (the “Ems” telegram), and the French government declared war.

Gramont resigned his post in August 1870 and went into political retirement. In 1872 he published La France et la Prusse avant la guerre (“France and Prussia Before the War”), a defense of his own activities in the events that precipitated the conflict.