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IS-2

Iosif Stalin heavy tank

heavy tankChelyabinsk Kirov Plant · 1944–1960

OVERVIEW

Soviet breakthrough heavy tank used in the final offensives into Germany.

HISTORIAN'S COMMENTARY

Before the Storm

Introduced between 1944 and 1960, IS-2 entered service as a heavy tank in Soviet Union armored formations, built by Chelyabinsk Kirov Plant.

In the Field

With 122mm D-25T gun, armor up to 120 mm on the front, and a top speed around 37 km/h, this 46-ton machine carried both promise and mechanical burden. About 3,854 were produced for a war that demanded constant replacement.

Historian's Note

On the battlefield it was expected to break prepared lines and survive punishment that would stop lighter vehicles. Its legacy is tied to survivability at the point of contact, though weight and logistics always set hard limits.

SPECIFICATIONS

Crew4
Weight46 tonnes
Main Armament122mm D-25T gun
Armor (Front)120 mm
Armor (Side)90 mm
Armor (Rear)60 mm
EngineV-2-IS diesel (600 hp)
Max Speed37 km/h
Range240 km
Production3,854 built

DEVELOPMENT

The IS-2 was built as a breakthrough heavy tank with a 122 mm gun suitable for anti-fortification and anti-armor work. Its design reflected Soviet late-war emphasis on shock offensives.

COMBAT HISTORY

IS-2 regiments supported assaults against fortified lines and urban objectives in the final campaigns. The gun was powerful, though rate of fire was slower than medium-tank systems.

NOTABLE USES

  • [01]Late-war Soviet offensives in Poland and Germany. - IS-2 faced the classic WW2 armor tradeoff between protection, mobility, and sustained operations.
  • [02]Urban assault support during the Berlin campaign. - This campaign context tested crew coordination, recovery capability, and maintenance depth under pressure.
  • [03]Breakthrough operations against prepared defensive belts. - Operational records from this setting show how armor performance depended on combined-arms support, not tank specs alone.

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