Gérard Klein
Gérard Klein (born in 1937) is a French science fiction author. He is also known as Gilles d'Argyre.
Original title: Les Seigneurs de la Guerre. Translated into English in 1973.
George Corson, earthman, is sent on secret mission to end a long smoldering war with the birdlike inhabitants of the planet, Uria, 6,000 years in the future.