When did the final stage of the final solutionn begin?

The final stage of the Final Solution, known as the systematic extermination of the Jewish population, began in earnest in the summer of 1941. This phase involved mass shootings and the establishment of extermination camps, particularly after the implementation of Operation Reinhard in 1942. The most notorious camps, such as Auschwitz, became central to this genocidal effort, leading to the deaths of millions of Jews and others deemed undesirable by the Nazi regime.