The delivery of Soviet heavy artillery complimented the nine divisions of the 109th, the 117th and the 122nd Rifle Corps.[5] The 109th and 117th Corps were concentrated close to the Sinimäed, while the 122nd Rifle Corps was sent to the southern section, near the church of Vaivara Parish. The positions of the 11th Infantry Division were mainly attacked by the 35,000-strong 8th Army with their 112th Rifle Corps, two fresh tank regiments and 1,680 assault guns, deployed in nine artillery regiments and 150 armored vehicles.[7] The armored forces included the brand-new IS-2 tanks with extra armor and a 122mm gun.