The war crimes trials following World War II were later observed featuring many of the phenomena and issues seen in Page's account of Wirz's trial, conviction, sentencing, and execution. The Nuremberg Criminal Court for war crimes (and subsidiary courts like the Dachau International Military Tribunal) prosecuted only Axis nationals or collaborators, and did not prosecute Allied war crimes. This led to the paradox that no one from the Soviet Union was charged although the USSR had participated in the Invasion of Poland on September 17, 1939. So while German defendants were charged with waging war of aggression for Germany's attack on Poland, no one from the Soviet Union was charged even though the USSR had attacked Poland as well. Indeed, the Soviets even sat in judgment, as one of the four Allied judges was Soviet. Similarly, one of the indictments was "conspiracy to wage aggressive war", but the Soviets who conspired with the Nazis to wage aggressive war against Poland were not indicted.