In Britain, a great deal of study on the future of tank warfare was carried out, and there were some differences. Whilst both J.F.C. Fuller and Basil Liddell Hart foresaw a war where all arms, infantry, tanks and artillery, would be mechanised, Fuller's theories looked at all-arms formations with artillery, infantry and military engineers mounted on similar vehicles to keep pace with the tanks. He foresaw armies using heavy all-arms formations to break through opponents defences, allowing lighter, faster units to make rapid advances, thereby not allowing the enemy to re-establish any defences. Liddell Hart considered that armoured vehicles would carry their own supporting infantry, in much the same way as modern warships carry their own marine detachments; he also proposed using indirect attack, effectively going around any defences. During the late 1920s the British Army established the Experimental Mechanized Force, to test these theories and look at the basic problems of managing, controlling and commanding all arms formations, including the use of aircraft. Many of the units involved in this force were posted to North Africa, where their experience played a major part in the British success in the East African Campaign and General Wavell's initial successes in the Western Desert campaign. The British used three classes of tank: the 'Infantry tank', for supporting the infantry; the 'Cruiser tank', for fast moving encounter battles and reconnaissance; and the light tank, for reconnaissance, escort and internal security.