With a view to increasing Union preparedness in responding to incidents, ENISA should regularly organise cybersecurity exercises at Union level, and, at their request, support Member States and Union institutions, bodies, offices and agencies in organising such exercises. Large-scale comprehensive exercises which include technical, operational or strategic elements should be organised on a biennial basis. In addition, ENISA should be able to regularly organise less comprehensive exercises with the same goal of increasing Union preparedness in responding to incidents.