Japan during World War II reconstruct the "'critical mass' of both large numbers of carriers and well-trained air groups". Australian land forces defeated Japanese Marines in New Guinea at the Battle of Milne Bay in September 1942, which was the first land defeat suffered by the Japanese in the Pacific. Further victories by the Allies at Guadalcanal in September 1942, and New Guinea in 1943 put the Empire of Japan on the defensive for the remainder of the war, with Guadalcanal in particular sapping their already-limited oil supplies. During 1943 and 1944, Allied forces, backed by the industrial might and vast raw material resources of
Nazi crimes against the Polish nation Nazi crimes against the Polish nation Crimes against the Polish nation committed by Nazi Germany and collaborationist forces during the invasion of Poland, along with auxiliary battalions during the subsequent occupation of Poland in World War II, consisted of the systematic extermination of Jewish Poles and the murder of millions of (non-Jewish) ethnic Poles. The Germans justified these genocides on the basis of Nazi racial theory, which depicted Jews as a constant threat and regarded Poles and other Slavs as racially inferior "Untermenschen". By 1942 the Nazis were implementing their plan to kill every Jew in German-occupied Europe, and had