Like naval cruisers, cruiser tanks were fast and mobile for operations independent from slower-moving infantry with their heavier infantry tanks and artillery. When gaps had been forced through the opponent's front by the infantry tanks, cruisers were to penetrate to the rear and attack lines of supply and communication centres in accordance with the theories of J.F.C. Fuller, Percy Hobart and B. H. Liddell Hart. The cruiser tank was designed for use in a manner similar to cavalry, which made speed the most important factor and to achieve this, early cruisers were lightly armoured and armed to save weight.