From the beginning of
Operation Barbarossa Rubanyuk was sent to the front in June and appointed commander of the 134th Army Reserve Rifle Regiment of the
9th Army at
Pervomaysk. He commanded this regiment until October 1941, then was appointed commander of the 591st Rifle Regiment of the
176th Rifle Division of the
Southern Front. The regiment saw its first action in fighting for the station of
Debaltsevo, then fought as part of the
12th Army in the operational group of General F.V. Kamkov. Rubanyuk led the regiment through the winter in the
Donbass defensive and the
Rostov defensive and offensive operations. In February 1942 Lieutenant Colonel Rubanyuk was appointed deputy division commander of the 176th, and took command of the division on 19 July. As division commander, with the 12th Army, he led it in the battles for Voroshilovsk,
Voroshilovgrad, and others, and the retreat to the Don. Subsequently the division conducted battles for
Bataysk,
Budyonnovsk, on the
Manych and
Mineralnye Vody. Then, entering the
37th Army of the
Transcaucasian Front, the division concentrated in the
Mozdok region, where it repulsed German attempts to break through the main ridge of the Caucasus. For active participation in the Mozdok-Malgobek and Nalchik-Ordzhonikidze defensive operations the division was awarded the Order of the Red Banner. Rubanyuk was promoted to command the
11th Rifle Corps on 13 October and received the rank of major general on 10 November. He led it in the
North Caucasus Offensive, then from 11 February 1943 commanded the
10th Guards Rifle Corps, then part of the
56th Army of the Transcaucasian Front. During 1943 the corps was part of the
18th,
56th,
44th, and
28th Armies of the
North Caucasus, Southern,
4th,
3rd, and
2nd Ukrainian Fronts. In March and April 1944 its units as part of the
5th Shock Army of the
3rd Ukrainian Front participated in the
Odessa Offensive and the liberation of
Odessa. Then as part of the
46th Army the corps participated in the
Budapest,
Vienna and
Prague Offensives. == Postwar ==