Russia-Ukraine War l Why Putin's New Army Corps Lasted Only Days On The Battlefield

Russian military formed a powerful new army corps to contain Kyiv’s counteroffensive. However, reports claim that Russia’s 3rd Army Corps suffered a massive blow and failed to sustain Ukraine’s assault. In September, the Kremlin rushed the 3rd AC’s group to Kharkiv in a desperate bid to block a Ukrainian counteroffensive. In a blow to Moscow, the 3rd AC “failed” and had to retreat across the Russian border. Why did Russia's elite force created only for this war fail to deliver?