'Annemasse' was a German undertaking, by the special operations branch of the Abwehr, to blow up the Annemasse railway viaduct in unoccupied France just over the border from the Swiss city of Geneva (late 1940).

The rationale for this operation was the German desire to prevent the supposed transportation of the detonators used in anti-aircraft cannon projectiles from the Oerlikon manufacturing facility in neutral Switzerland via France to Spain for onward shipment to the UK.