Title: German tanks in World War II
Content: Number built—6,000  The Panther was a medium tank (45 tonnes) with a crew of five, which was designed to counter the Soviet T-34 tank. In weight it was comparable to Soviet heavy tanks. This tank was introduced in the Battle of Kursk, one of the largest tank battles in history. It had sloped armor which increased the effective relative thickness of the armor from 80 mm to roughly 140 mm, effectively making the front of the tank virtually impervious to enemy fire. However the sides of this tank were very vulnerable, ranging from only 40 mm to 50 mm of either barely sloped or completely flat armor plating. The tank carried a high-velocity 75 mm gun, which possessed more penetration than the Tiger's 88 mm gun at short range. Series production began in 1943. The tank is considered by some to have been the best tank in the war, and to have greatly influenced post-war tank designs, setting a role model for the balance of firepower, mobility, and armor protection.
Title: Tanks in World War II
Content:  The Soviet Union started and ended the war with more tanks than the rest of the world combined (18,000–22,000). At the start of World War II the most common tank in Soviet service was the T-26 (derived from the Vickers 6-ton), lightly armoured and armed with a 45 mm gun capable of penetrating most German tanks at normal combat ranges. Few had radios. The design was mechanically sound although incapable of further development. The BT tank series, based on the Christie suspension system, were usually armed with the same 45 mm gun and were the most mobile tanks in the world at the time. Close-support versions 
Title: German tanks in World War II
Content:   Nazi Germany developed numerous tank designs used in World War II. In addition to domestic designs, Germany also used various captured and foreign-built tanks. German tanks were an important part of the Wehrmacht and played a fundamental role during the whole war, and especially in the blitzkrieg battle strategy. In the subsequent more troubled and prolonged campaigns, German tanks proved to be adaptable and efficient adversaries to the Allies. When the Allied forces technically managed to surpass the earlier German tanks in battle, they still had to face the experience and skills of the German tank crews and most powerful and technologically advanced later tanks, such as the Panther, the Tiger I and Tiger II, which had the reputation of being fearsome opponents.
Title: German tanks in World War II
Content: Number built—492  Even larger and heavier than the Tiger I, the Pzkpfw VIB Tiger II. It is also known under the informal name Königstiger (the German name for the "Bengal tiger"), often semi-literally translated as the King Tiger or Royal Tiger by Allied soldiers. It was the largest tank mass-produced by German forces during the war, and remains among the heaviest mass-produced tanks ever. Its 8.8 cm KwK 43 could knock out virtually every Allied tank, while its sloped armor was thick enough to defeat most Allied guns (excluding hollow charge weapons). However, the Tiger II suffered from multiple mechanical problems due to its rushed development and excessive weight. It was named after the Tiger but it was a combination of innovations learned from the Panther and Tiger I.
Title: Heavy tank
Content:  The first British tank, the Mark I of World War I, was introduced to break through German defensive lines of trenches and barbed wire. When lighter, faster tanks were introduced, the larger tanks were classified as heavy. The Char 2C was one of the largest tanks ever produced. At the start of World War II, France and the Soviet Union were the only countries to have inventories of heavy tanks, such as the Char B1, T-35, and KV-1. The Matilda II was designed under the British infantry tank concept which is similar to the heavy tank having thick armour and tending to weigh more than their other tanks. It’s usually separate because they have less firepower with their cruiser tanks (comparable to mediums) at the time having the same main armament but 
Title: American armored fighting vehicle production during World War II
Content:  The Pershing heavy tank (named after General Pershing) was the only heavy tank used in combat by the US armed forces during World War II. An earlier design, the M6 Heavy Tank, was not accepted for series production and only 40 were produced. Work began in early 1945 to develop a significantly heavier variant of the M26 Pershing, the T32 heavy tank, but after the end of the World War II, the project was cancelled and the vehicles were scrapped.
Title: History of the tank
Content:  saw action on numerous occasions but suffered consistently high losses. In 1918 the Renault FT light tank was the first tank in history with a "modern" configuration: a revolving turret on top and an engine compartment at the rear; it would be the most numerous tank of the war. A last development was the superheavy Char 2C, the largest tank ever to see service, be it some years after the armistice. The German response to the Cambrai assault was to develop its own armoured program. Soon the massive A7V appeared. The A7V was a clumsy monster, weighing 30 tons and with a crew of eighteen. By the end 
Title: Tanks in World War II
Content:  compact 75 mm gun. Ergonomically the tank was quite good also. However, the M24 did not appear in combat until December 1944 and equipped only a few units by the end of the war. Near the end of the war the M26 Pershing tank was deployed as the first operational heavy tank of the US Army. It was designated a heavy tank when it was designed in WWII due to its 90 mm gun, which was at the time the largest caliber gun found on a US tank. The Pershing was a very modern design with torsion-bar suspension, heavy armor, and an 
Title: Light tank
Content:   At the start of World War II, the majority of all of the great powers' tank forces consisted of light designs. The most common were the British Light Tank Mk VI, French Renault R35, German Panzer I, Italian L3/35 (classified as a light tank by the Royal Italian Army, a tankette by others), Japanese Type 95 Ha-Go light tank, Soviet T-26, and American M2 light tank.
Title: Tanks in the Soviet Union
Content:   The Iosif Stalin tank (or IS tank, named after the Soviet leader Joseph Stalin) was a heavy tank developed by the Soviet Union during World War II. The tanks in the series are also sometimes called JS or ИС tanks. The heavy tank was designed with thick armour to counter the German 88 mm guns, and carried a main gun that was capable of defeating the German Tiger and Panther tanks. It was mainly a breakthrough tank, firing a heavy high-explosive shell that was useful against entrenchments and bunkers. The IS-2 was put into service in April 1944, and was used as a spearhead in the Battle of Berlin by the Red Army in the final stage of the war.

Question: what was the biggest tank in world war 2?
Answer: Panzerkampfwagen VIII Maus.