Final answer:
The Rabbi's son was abandoned on the cold march to Gleiwitz by the Rabbi himself, highlighting the harrowing choices individuals had to make during the Nazi death marches of World War II.
Step-by-step explanation:
The son of the Rabbi was abandoned on the cold march to Gleiwitz by the Rabbi himself. This tragic event took place during one of the death marches that occurred in early 1945 as the Nazis forced Jewish prisoners to march through harsh conditions before the closure of the concentration camps. Victims like the Rabbi's son were often left behind by family, friends, or fellow prisoners, sometimes as a matter of survival, other times due to innumerable other heartbreaking circumstances.