[1] Prior to the battle, Soviet units of the 2nd Ukrainian Front occupied the Vulcan Pass, as well as the cities of Brașov and Sibiu.

The Soviet Stavka (high command), was surprised by the unexpected Hungarian offensive, and decided to strengthen its forces in the area to prevent another one.

The advancing Red Army armored units were stopped by the 3rd Battalion of the Hungarian 25th Infantry Division (headquartered at Oradea)—at the road intersection at Vințu de Sus—on 13 September.

On 15 September, the Soviets and Romanians launched a major attack south of Turda, preceded by a heavy artillery bombardment.

On 19 September, the 25th Infantry Division—supported by the 10th Assault Gun Battalion with Zrínyi IIs—attacked the Soviet 4th Guards Rifle Division, after a brief artillery barrage.

After the battle, the entire enlisted body of the III./25 ID and another company was promoted one rank up for bravery on the battlefield, an unprecedented move in the history of the Royal Hungarian Army and its forebears.