General Mikhail Petrov, slightly further forward at Slonim. Altogether, on 22 June the Western Special Military District fielded 671,165 men, 14,171 guns and mortars, 2,900 tanks and 1,812 combat aircraft. The Western Front was on the main axis of attack by the German Army Group Centre, commanded by Field Marshal Fedor von Bock. German plans for Operation Barbarossa called for the Army Group Centre's Second Panzer Group, under Colonel General Heinz Guderian, to attack south of Brest, advance through Slonim and Baranovichi, turning north-east towards Minsk where it would be met by Colonel General Hermann Hoth's Third Panzer Group, which would attack Vilnius, to the north of the Białystok salient, and then turn south-east. In addition to the two panzer groups. The Army Group Centre also included Field Marshal Günther von Kluge's Fourth Army and Colonel General Adolf Strauss' Ninth Army. Air support was provided by Field Marshal Albert Kesselring's Luftflotte 2 which contained more than half the German aircraft committed to the attack on the Soviet Union. Defeat on the Frontiers 22–28 June The war started disastrously for the Western Front with the Battle of Białystok-Minsk. The German Ninth and Fourth Armies of Army Group Centre penetrated the border north and south of the Białystok salient. The Front's tanks and aviation at airfields were annihilated by German air strikes. Soviet command and control suffered almost complete breakdown. Worst hit was the 4th Army, which failed to establish communications with headquarters both above and below it. Attempts to launch a counter-attack with the 10th Army on 23 June were unsuccessful. That same day the German Third Panzer Group captured Vilnius after outflanking the 3rd Army. On 24 June, Pavlov again attempted to organize a counter-attack, assigning his deputy Lieutenant General Ivan Boldin the command of the 6th and 11th Mechanized Corps and the 6th Cavalry Corps, commanded by Major General Ivan Semenovich Nikitin. With this mobile force Boldin was to attack northward from the Białystok region towards Grodno to prevent encirclement of Soviet forces in the salient. This attempted counter-attack was also fruitless. Almost without any interference from Soviet fighters, the close support aircraft of Germany's 8th Air Corps were able to break the backbone of Western Front's counter-attack at Grodno. The 6th Cavalry Corps was so badly mauled by this aerial onslaught against its columns that it was unable to deploy for attack. Jagdgeschwader 53's Hermann Neuhoff recalled: Of