Marie Bertrand Alfred Fagalde (22 July 1878, Boghar, Algeria – 6 February 1966, Garches, Paris) was a French Army officer.

He fought in Flanders in May and June 1940 and also took part in the battle of Dunkirk, commanding the western perimeter defence alongside French Admiral Abrial whilst the British General Ronald Forbes Adam of III Corps commanded the eastern British sector of the perimeter.

He was liberated by the Soviet Army on 9 May 1945 but just after his return to France he was indicted for "intelligence with the enemy" or "acts harming national defence" during his captivity.

He was accused of having asked to join the Waffen SS for unknown reasons, although he was held to have retracted the offer when he found out he would have to wear German uniform.

He was found guilty and sentenced to five years' solitary confinement, loss of his rank and confiscation of his property.