A little excursion into history …
On July 12, 1942, 500 Soviet tanks, primarily T-34s, charged headlong at roughly 300 German Panzer IV tanks that were part of the II SS-Panzer Corps near a place called Prokhorovka, which is in Belgorod Oblast, right across the border from Kharkiv, Ukraine.
On paper, the two types of tanks were well-matched. Both weight about 25 tons, both carried 75mm cannons. The Russian tanks had more powerful engines, which theoretically made them not just faster, but more capable of maintaining speed in tough conditions, and quicker to move in or out off good positions for attack. Both sides were backed by self-propelled artillery and tank destroyers.
Despite the greater numbers on the Soviet side, and arguably better tanks, the Germans were more experienced and had better officers. By the end of the day, Russia has lost at least 400 tanks. At least 300 of these were “irrevocably lost.”
Even so, Prokhorovka was a Soviet victory, in the sense that the Germans, short of fuel and ammo and just physically exhausted, had to withdraw without securing their advance. The Soviets won the day—at terrible cost.
Prokhorovka was arguably the greatest loss of armor in Soviet, or Russian, history. Until the Battle for Kyiv.
Because if the last month is considered as one prolonged battle, not only did Russia lose more tanks, it also lost the battle.