A Czech regiment lost 93% of its men to desertion in a single night at the Carpathians (source: Wawro again). I didn't write about any other regiments, not sure if you've confused me with someone else.
You will be just a cases of the Austro-Hungarian army, or will we see some discovery from Italy and Russia (there not are only regiments, but divisions)? The solution would be if historians have drawn increasingly also from the original official reports of the Austro-Hungarian army, or directly translate the newspapers and regimental books (as in the case of Entente newspapers).
Probably you have in mind the case of IR Nr.28 when fantasy legionnaires and historians have surpassed their limits.
Here truer version:
In October 1914, the Austrian army attempted assault crossing Sanu. Only units with thickness of 4 battalions did it with Rzuchowa get to the other side. Among them were also two companies of the 28th Regiment. Marshal Roth's speech declared "old-Austrian matchless bravery". For the rest of October and November 1914 the regiment fought on exit roads.
At the end of the year. 1914 has proceeded queue along the ridges of the Carpathian Mountains and threatened Russian invasion Plain. Problem was the new marching battalions (losses of regiment in previous months were more than 4,000 killed and wounded) that were hastily and inadequately trained and showed declining morale.
The Russians broke through the front at Regetówa. 28th regiment was sent to instead plugged a breakthrough. After completion of the VIII. the Marching battalion in the regiment Bardějov manpower increased to 1,300 men. A large portion of the fresh advances were men nedostatatečně prepared for the hardship on winter Carpathian battlefield.
In extremely difficult mountainous terrain, we managed to conquer some positions of the Russian army, but because of exhaustion, it was necessary to stop the process, and two battalions of the 28th Regiment (I and III.) Moved into defense. The situation was very precarious. I. battalion on the crest Šekovky had unprotected flank from Palikówka and did not have no machine-gun. Position III. Battalion on Suchy peak was not much better. In addition, two battalions were separated by a valley, which made it difficult to communicate with each other and the way the enemy could penetrate to the rear.
The frozen ground was possible only dig shallow pits and team equipment was not suitable for the harsh winter conditions. Against osmadvacátníkům intelligence began to operate two platoons Czech entourage (first Legion), which tried to convince the soldiers to switch to the Russians.
Under such circumstances, the Russians launched on Holy Saturday, the 3rd 4th 1915 attack against the position of the 28th Regiment. This was not an isolated assault but a part of a larger operation. Both battalions found themselves in a very difficult situation as they were virtually surrounded. After fighting and trying to pierce the majority of soldiers of the 28th Regiment surrendered. Among the soldiers were undoubtedly those who surrendered without resistance. Rather than ideological motives played a role here sheer physical exhaustion. However, we certainly can not talk about collective "transition 28th Infantry Regiment to the Russians," as it later claimed Czech postwar nationalist historiography. According to documents III. Army after the fight was collected 350-400 uninjured members of the regiment. Given that before the battle regiment numbered about 1,300 men, was a total loss (killed, wounded and sick) 900-950 men, ie. 69-73% of the actual state.
Investigations by the Divisional Court in Timisoara did not proven of treason and cowardice and was stopped. He began to put pressure on rehabilitation regiment. 12. 6. 1915 issued a Decision to dissolve the rest of the 28th Regiment, but this measure was to be his replacement battalion in Szeged "until further notice" be withdrawn.
6. 6. Meanwhile, the marching battalion XI / 28 sent to Italy to sočskou front, where it should be disbanded and its soldiers should be assigned to other units. Upon arrival in the area Dornberg (Montespino) - Stanjel (S. Daniel). Battalion commander asked the governor Helly 93rd Infantry Division commander General von Booga order to fight his battalion as a whole. That it finally was allowed. "28th" then in the first battle on the Soca participated in repelling the Italian offensive. 2nd battle on the Soca, which began 23. 7., the battalion XI / 28 took part in the recapture of the strategic heights of Monte S. Michele. They were then pulled into Tolmeinu "28th", where his great losses during October replaced. During the third battle on the Soca Battalion remained in reserve. For IV. battle on the Soca "28th" found themselves again at the Monte S. Michele, who had the task of defending against Italian attacks. Twice Italian troops divisions 22 and 29 managed to break until mid-western and northern slopes, they were always driven counterattack "28th". Monte S. Michele was ubráněn. The fighting killed the commander of the battalion governor von Helly.
This exceptional combat performance has led to the fact that Emperor Franz Joseph I. revise its decision on the dissolution of the regiment. Battalion XI / 28 was sent to Scutari Albanian. Here "28th" they learned about the orders of the army and were returned to the battalion. Commander restored regiment became Leo Mauterer.