commit their strategic reserves to reinforce the Voronezh Front: the 5th Guards and 5th Guards Tank Armies, both from the Steppe Front, as well as the 2nd Tank Corps from the Southwestern Front. Ivan Konev objected to this premature piecemeal commitment of the strategic reserve, but a personal call from Stalin silenced his complaints. In addition, on 7 July Zhukov ordered the 17th Air Army – the air fleet serving the Southwestern Front – to support the 2nd Air Army in serving the Voronezh Front. On 7 July, the 5th Guards Tank Army began advancing to Prokhorovka. 5th Guards Tank Army commander, Lieutenant General Pavel Rotmistrov, described the journey: The 10th Tank Corps, then still subordinate to the 5th Guards Army, was rushed ahead of the rest of the army, arriving at Prokhorovka on the night of 7 July, and 2nd Tank Corps arrived at Korocha, southeast of Prokhorovka, by morning of 8 July. Vatutin ordered a powerful counterattack by the 5th Guards, 2nd Guards, 2nd and 10th Tank Corps, in all fielding about 593 tanks and self-propelled guns and supported by most of the Front's available air power, which aimed to defeat the II SS Panzer Corps and therefore expose the right flank of XLVIII Panzer Corps. Simultaneously, the 6th Tank Corps was to attack the XLVIII Panzer Corps and prevent it from breaking through to the free Soviet rear. Although intended to be concerted, the counterattack turned out to be a series of piecemeal attacks due to poor coordination. The 10th Tank Corps' attack began on the dawn of 8 July but they ran straight into the antitank fire of the 2nd and 3rd SS Divisions, losing most of its forces. Later that morning, the 5th Guards Tank Corps' attack was repelled by the 3rd SS Division. The 2nd Tank Corps joined in the afternoon and was also repelled. The 2nd Guards Tank Corps, masked by the forest around the village Gostishchevo, north of Belgorod, with its presence unknown to the II SS Panzer Corps, advanced towards the 167th Infantry Division. But it was detected by German air reconnaissance just before the attack had materialized, and was subsequently decimated by German ground-attack aircraft armed with MK 103 anti-tank cannons and at least 50 tanks were destroyed. This marked the first time in military history an attacking tank formation had been defeated by air power alone. Although a fiasco,