was there a genocide during this war?
Yes, Nazi Germany was responsible for the Holocaust (which killed approximately 6million Jews) as well as for killing 2.7 million ethnic Poles and 4million others as part of a programme of deliberate extermination, in effect becoming a "genocidal state".
World War II
Nazi Germany was responsible for the Holocaust (which killed approximately 6million Jews) as well as for killing 2.7 million ethnic Poles and 4million others who were deemed "unworthy of life" (including the disabled and mentally ill, Soviet prisoners of war, Romani, homosexuals, Freemasons, and Jehovah's Witnesses) as part of a programme of deliberate extermination, in effect becoming a "genocidal state". 
who built grand central station in new york city New York Central Railroad where is it located? At 42nd Street and Park Avenue in Midtown Manhattan, New York City. what are some of its uses? The size of the Main Concourse has made it an ideal advertising space - during World War II, a large mural with images of the United States military hung in the concourse. what was the after-effects of the war you just mentioned? The Allies established occupation administrations in Austria and Germany; denazification programme in Germany led to the prosecution of Nazi war criminals in the Nuremberg trials and the removal of ex-Nazis from power. how many casualties were recorded? Around 60 million people died in the war, including about 20 million military personnel and 40 million civilians. was there any advances in the technology they used? Yes, aircraft were used for reconnaissance, as fighters, bombers, and ground-support, and each role was advanced considerably. where did this war take place? It was a global war that involved the vast majority of the world's countries.
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World War II [SEP] Genocide, concentration camps, and slave labour
Japanese prisoner-of-war camps, many of which were used as labour camps, also had high death rates. The International Military Tribunal for the Far East found the death rate of Western prisoners was 27 per cent (for American POWs, 37 per cent), seven times that of POWs under the Germans and Italians. While 37,583 prisoners from the UK, 28,500 from the Netherlands, and 14,473 from the United States were released after the surrender of Japan, the number of Chinese released was only 56.