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
What Hurts the Most Hurts the Most" was solicited to mainstream radio stations on December 11, 2007 in the United States, following its digital and physical release within the two weeks before. In Germany, the cover was released as a CD and digital single on January 4, 2008, through Zeitgeist. In contrast to the original version, Cascada's cover of "What Hurts the Most" deviates from the country sound and replaces it with Europop electronic beats and elements typical of DJ Manian and Yanou productions. However, the song opens with an acoustic guitar playing and Horler's vocals being reverbed by electropop synths. Sharon Mawer of