Russian forces have been forced to pull obsolete, Soviet-era tanks from storage to compensate for the losses of modern equipment in battle.
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Why Is Russia Losing More Of Its Best T-90 Tanks?
The Ukrainian military captured the Russian T-90M 'Proryv' tank
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Russia's T-90A Tank Is An Endangered Species
Ukrainian, Russian Forces Prepare For Onset Of Brutal, 42% OFF
T-90 - Wikipedia
Russia having difficulty making new weapons, but might have enough
