For the start, can't but thank your granddad for liberating Vienna from the Nazis.

Regarding the Battle of Kharkov: it might sound strange, but I've always been so busy running my own research, that I never studied the…

For the start, can't but thank your granddad for liberating Vienna from the Nazis. Hope, none of idiots here is going to find the current situation opportune to destroy the Memorial for nameless Soviet soldier at the Schwarzenberg Platz.

Regarding the Battle of Kharkov: it might sound strange, but I've always been so busy running my own research, that I never studied the Second World War closely enough. 'Problem' is: what I'm usually doing (i.e. researching such air forces and air wars like those of Angola, Egypt, Iran, Iraq, Syria, Yemen) is something nobody else does (and nobody did before), and is so work-intensive that it's keeping me busy for 35+ years, meanwhile. While this is helping me understand the modern-day Soviet Army, I am not knowledgeable enough to discus such topics like Battle of Kharkov. I only recall to have read somewhere that within the Soviet Armed Forces there was a lots of grudge vis-a-vis Kruschev - apparently for causing the death of so many troops at Stalingrad.

Thus, can't really say if the history might repeat itself - at least not in this case. Only that - when I look at that map on Wikipedia - I'm quite sure the RFA of 2022 is never going to manage anything like even roughly similar advances like the SA managed in May 1942.