Cahagnes is a village located in Normandy, in Calvados, in Pré-Bocage.

Following the archaeological excavations carried out during the construction of the A84 motorway, a proto-historic site was discovered at Cahagnes, dating from 6000 to 3100 BC. It reveals a human presence at that time.

In the 11th century, Guillaume de Cahagnes is the lord of the village. He goes to the side of Guillaume the Conqueror during the conquest of England. On his return, the Duke of Normandy rewarded the lord of Cahagnes with vast estates, both in England and in the duchy. Raoul de Cahagnes, son of Guillaume de Cahagnes, inherited his father’s vast estates and made numerous donations to several abbeys. Thus he fortified the English priory of Merton, possession of the church of Cahagnes.
The sieuries of Vauvrecy and Aubigny dominate Cahagnes between XII and XVII th century.

It was found among the sieural rents, due to the Lord of Cahagnes, that of "being subjet to go and tread the sheets of woollen carded at the great mill of the said sieurie by paying four denarii tournas per alder."

In "monumental statistics of Calvados", Arcisse de Caumont states that in the 13th century, Cahagnes had a leper colony and belonged to the canons of Merton.

Following the bombing of 1944, Cahagnes received by decision of November 11, 1948, a citation to the order of the regiment and the corresponding war cross.