The Tiger I was a German heavy tank developed in 1937 by Henschel & Sohn when the Waffenamt requested Henschel to develop a Durchbruchwagen, this would result into the Durchbruchwagen I which would never be fitted with a turret and was replaced by the Durchbruchwagen II after the request for a heavier 30-tonne class vehicle with thicker armour. The project was dropped in 1938 in favor of the larger and better-armoured VK 30.01 (H) and VK 36.01 (H), these vehicles would use the complex over-engineered Schachtellaufwerk track suspension system of torsion bar-sprung, overlapped and interleaved main road wheels, which would later become problematic when jamming solid in the winter. Four prototype hulls were completed for testing. Two of these were later modified to build the "Sturer Emil" self-propelled anti-tank guns. In 1941 with the experience of the Battle of France, Henschel and Ferdinand Porsche were asked to submit designs for a 45-tonne heavy tank, to be ready by June 1942. Porsche worked on an updated version of their VK 30.01 (P) Leopard tank prototype while Henschel worked on an improved VK 36.01 (H) tank. Henschel built two prototypes: a VK 45.01 (H) H1 with an 8.8 cm L/56 cannon, and a VK 45.01 (H) H2 with a 7.5 cm L/70 cannon. Porsche and Henschel submitted prototype designs, each making use of the Krupp-designed turret. The Henschel design was accepted, mainly because the Porsche VK 4501 (P) prototype design used a troubled petrol-electric transmission system. Production of the Panzerkampfwagen VI Ausf. H began in August 1942. The tank was given its nickname "Tiger" by Ferdinand Porsche, and the Roman numeral was added after the Tiger II entered production. The initial designation was Panzerkampfwagen VI Ausführung H was re-designated as PzKpfw VI Ausf. E in March 1943. The Tiger was still at the prototype stage when it was first hurried into service, and therefore changes both large and small were made throughout the production run. A redesigned turret with a lower cupola was the most significant change. To cut costs, the river-fording submersion capability and an external air-filtration system were dropped. It would first see action near Leningrad on 23 Sep. 1942 months earlier than had been planned. A platoon of 4 Tigers went into action, they could not operate in swampy, forested terrain, their movement was largely confined to roads and tracks, also many of these early models were plagued by problems with the transmission and many broke down, the Soviets also captured one Tiger largely intact, it enabled the Soviets to study the design and prepare countermeasures. In the North African Campaign, the Tiger I first saw action during the Tunisian Campaign on 1 December 1942 east of Tebourba. The tanks proved that they had excellent ... https://www.youtube.com/watch?v=PCQBXSlsH0U