Fort des Basses Perches, also known as Fort Valmy, was built between 1874 and 1877 in Danjoutin and Belfort in northeastern France. It is part of the first ring of fortifications around the city of Belfort. The Forts des Perches were unique among the first group in their re-use of older sites. They were rebuilt as part of the Séré de Rivières system and incorporated improvements to deal with the improvement in efficacy of artillery in the late 19th century. The fort's official name was derived from François-Christophe Kellermann, Duke of Valmy and Marshal of France.