In March 1942, the Auschwitz extermination camp goes active. A few days later, the Belzec and Sobibor extermination camps begin to bellow their unique smoke into Europe’s spring skies. On March 17, 1942, the deportation of the Jews of Lublin to Belzec begins. On March 24 the deportation of the Jews of Slovakia to Auschwitz begins. On March 27 begins the deportation of the Jews of France to Auschwitz. On March 30, the first Paris train carrying Jews arrives in Auschwitz.
The Germans didn't waste any time... The Wansee comitee was in January 1942.
Plus, I didn't know that Slovakian Jews were the first to be exterminated.