Guer is a commune in the Morbihan department in Brittany in north-western France.
It is located at the edge of the famous Brocéliande Forest, which is the setting of the Round Table novels in Brittany. It is 43 km southwest from Rennes, the regional capital.
Camp Coëtquidan is located in Guer and comprises three military educational facilities:
École Spéciale Militaire de Saint-Cyr, France's foremost military academy dedicated to the training of Army officers through direct recruitment;
École militaire interarmes, for non-commissioned officers; and
École Militaire du Corps Technique et Administratif.