World War II marked by 50 to 85 million fatalities, most of whom were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease, and the only use of nuclear weapons in war. Japan, which aimed to dominate Asia and the Pacific, was at war with China by 1937, though neither side had declared war on the other. World War II is generally said to have begun on 1 September 1939, with the invasion of Poland by Germany and subsequent declarations on Germany by France and the United Kingdom. From
Scuba diving fatalities This was sometimes due to defective or ill fitting fins, but in most cases the cause was not apparent. In 12% of deaths there were problems associated with the cylinder, usually from user error, such as use of an underfilled or undersized cylinder, the cylinder becoming unsecured from the harness, and failure to open the cylinder valve. In less than 5% of fatalities, there were problems due to malfunction or misuse of weight belt (excluding overweighting which is not a failure of the equipment), harness, mask, exposure suit, submersible pressure gauges and entanglement in lines deployed by the diver. Edmonds