In 1968 in Vietnam, the NVA and VC forces launched the Tet Offensive, a massive broad front attack on American positions throughout the country. Yes it failed on a military basis, but it got the point through that they were not beaten and that they would accept heavy casualties if necessarry. And the counter-offensive nearly worked, the Germans were about to break and front may have collapsed if Hitler hadn't ordered them to hold at all costs.

Kai, I'm not sure about this, but had Stalin counter-attacked in only a few places, it is possible the Germans could have encircled those attacks and dealt a very severe blow to the Red Army. I have to read up more on the status of the German mobile forces at the time of the attack though.

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