I only read abot the 7 Corps in a book about the allied forces of Stalin.
The 7th Army Corps did a lot of street fighting and had heavy losses with two soviet corps in the streets of Budapest.
Short before the fall of the sieged city of Budapest (after 51 days) Marshall Malinowskij ordered the Romanien troops into another position 60 km away from Budapest because he want not to part the victory with the Romanien forces.
I am looking for information about the Soviet 265 Guards Rifle Regiment, which was a part of the 86 Red Banner “Nikolaevskaja” Guards Rifle Division. Especially in the period between August 1944 and May 1945. What I already know is that the 86 Guards Rifle Division was a part of the 10 Guards Rifle Corps of the 46th Army. The 46th Army took part in the liberation of Romania, Bulgaria and Yugoslavia. The 46th Army was also involved in the battle of Budapest, Hungary. Is there anything known about the 265 Guards Rifle Regiment or the 86 Guards Rifle Division in this period of the war?
The Red Army Order of Battle (the 1985 edition, don't know if it's been updated), doesn't show the 86th Guards being in the 10th Guard Corps. The OOB of the 10th, according to it and the History of the RKKA in WWII web site shows the 49th and 109th Guards Rifle Divisions in Nov/Dec 1944. (The RKKA site also show the 18th Rifle Division in the 10th.)
The Red Army Order of Battle places the 86th in the 1st Guards Rifle Corps in Jan, 1944.
Interesting but what about this table? I found it on the RKKA website. The other information about the 86 Red Banner “Nikolaevskaja” Guards Rifle Division I got it from Paul Schmitt (Comprehensive guide to Soviet orders and medals).
Further to what Eryk said I came across the attached file on the Web showing the composition of the 3rd Ukrainian Front on 20 December 1944 (Dunantul region Hungary). It shows that the 265 GRR was in the 46th army reserves at that time.
The other scrap of info I have found is:
Battle of Debrecen: October 6, 1944 – October 29, 1944 (86th Guards Rifle Division part of 10th Guards Rifle Corps).
According to a Russian OoB-site the 86th Guards Rifle Division was part of the 10th Guards Rifle Corps from March 1944 to May 1945. From March to July 1944 this corps was part of the 5th Shock Army, after that part of the 46th Army. These army's switched between the 2nd and 3rd Ukrainian Fronts several times.