Louis Napoléon Eugène Joseph Conneau (born 9 January 1856, at Paris; died 29 January 1930, at Chaville and was buried in Montmartre Cemetery) was a French general who graduated from Saint Cyr military academy as part of the class of 1874–1876.

[1] They remained friends until the prince's death in 1879, sharing an Occitan oath: Passavant le meillor ("Accepting only the best").

From 1874–1876 Conneau attended, without the prince, Saint Cyr military academy, graduating as an army sub-lieutenant and joining the 23rd Dragoons.

During the Race to the Sea, Conneau commanded the 1st and 2nd [fr] cavalry corps, which included French and British units.

In the trench warfare that followed the Battle of the Marne, the Conneau Corps sometimes supported one army, sometimes another, and sometimes acted independently with attached infantry divisions.