Game description from the publisher:
With less access to VK-driven technologies, SSU engineers have had to invent other means to combat the powerful walkers deployed by their Axis and Allied foes. Their response? The Dust Tactics: IS-5 Heavy Tank comes equipped with serious SSU firepower in both of two Damage Resilient configurations.
Built to deal with serious threat of enemy aircraft, the Mao Zedong controls a battlefield at range with its Quad 85 mm AA Gun. These powerful guns are deadly to enemy aircraft and can be used effectively against ground targets as well.
Meanwhile, the SSU has long considered artillery the most important weapon on the modern battlefield. Since the beginning of the war, fielding these huge guns has proven a successful tactic for the Soviets, one which they see no reason to stop now. The second configuration of the IS-5, the Vladimir Lenin, is a powerful artillery platform, capable of reducing enemy targets to rubble with its massive 252 mm field mortar.