Germany–Japan relations Kaiserliche Marine in and around Chinese waters. Japan, eager to reduce the presence of European colonial powers in South-East Asia, especially on China's coast, sent Germany an ultimatum on 14 August 1914, which was left unanswered. Japan then formally declared war on the German Empire on 23 August 1914 thereby entering the First World War as an ally of Britain, France and the Russian Empire to seize the German-held Caroline, Marshall, and Mariana Islands in the Pacific. The only major battle that took place between Japan and Germany was the siege of the German-controlled Chinese port of Tsingtao in Kiautschou
War crimes in occupied Poland during World War II War crimes in occupied Poland during World War II It's estimated that over six million Polish citizens, divided nearly equally between ethnic Poles and Polish Jews, perished during World War II. Most were civilians killed by the actions of Nazi Germany, the Soviet Union and their respective allies. At the Nuremberg Tribunal, three categories of wartime criminality were established: waging a war of aggression, war crimes, and crimes against humanity. These three core crimes of international law were set apart from other crimes, and for the first time since the end of the war categorised as violations of fundamental human