Russia’s elite 4th Guards forged a fearsome reputation in Second World War battles but have been reduced to smoking wreckage in Trostyanets. After 25 days under Kremlin control, Trostyanets was once again flying the Ukrainian flag on Sunday. Footage posted online on Sunday showed Ukraine troops advancing in the Sumy region, with soldiers marching on foot in battle fatigues behind the cover of an armoured vehicle firing at Russian positions. The firefight ended with a huge explosion after a Ukrainian tank fired at the enemy. In the next scene, about 10 Russian troops, each wearing red armbands, are filmed lying...