 Russia relying on old stocks after losing 300 tanks in Ukraine. Russia has lost more than 3,000 tanks during its invasion of Ukraine, the equivalent of its entire pre-war active inventory, but has enough lower-quality armoured vehicles in storage for years of replacement, a leading research centre said, according to Reuters. It is noted that Ukraine has also suffered heavy losses since the invasion began in February 2022, but Western military replenishments have allowed it to maintain inventories while upgrading quality, the London-based International Institute for Strategic Studies said in its annual military balance report. Moscow has been able to trade quality for quantity though by pulling thousands of older tanks out of storage at a rate that may at times have reached 90 tanks per month, said the report, a key reference tool for defence analysts. Russia's stored inventories mean Moscow could potentially sustain around three more years of heavy losses and replenish tanks from stocks even if at lower technical standard irrespective of its ability to produce new equipment, the report said. Russia has an active force of 1,750 main battle tanks ranging from decades-old T-55s to its modern T-80s and T-90s, the military balance said. It has a further 4,000 in storage. The situation underscored a growing feeling of a stalemate in the fighting that may persist through 2024, the military balance said.