Tank-based combat engineering vehicles thumb|right|Churchill "Bobbin", a rolled roadsurface (like a chespaling mat) that could be laid for following vehicles to cross loose sand on a beach. The raised boxes at the rear of the vehicle are radiator extensions to allow deep wading in water. Most CEVs are armoured fighting vehicles that may be based on a tank chassis and have special attachments in order to breach obstacles. Such attachments may include dozer blades, mine rollers, cranes etc. An example of an engineering vehicle of this kind is a bridgelaying tank, which replaces the turret with a segmented hydraulic bridge. The Hobart's Funnies of the Second World War were a wide variety of armoured vehicles for combat engineering tasks. They were allocated to the initial beachhead assaults by the British and Commonwealth forces in the D-Day landings.
Tank-based c,ombat engineering vehicles thumb|right|Churchill "Bobbin", a rolled roadsurface (like a chespaling mat) that could be laid for following vehicles to cross loose sand on a beach. The raised boxes at the rear of the vehicle are radiator extensions to allow deep wading in water. Most CEVs are armoured fighting vehicles that may be based on a tank chassis and have special attachments in order to breach obstacles. Such attachments may include dozer blades, mine rollers, cranes etc. An example of an engineering vehicle of this kind is a bridgelaying tank which replaces the turret with a segmented hydraulic bridge. The Hobart's Funnies of the Second World War were a wide variety of armoured vehicles for combat engineering tasks. They were allocated to the initial beachhead assaults by the British and Commonwealth forces in the D-Day landings.