1700-1900 Industrial Revolution Improvements in agriculture, technology, transportation and manufacturing lead to increased life expectancy. The population of Britain almost doubles in 50 years, from 8.3 million in 1801 to 16.8 million by 1851. 1803-1815, Napoleonic Wars The series of wars declared against Napoleon's French Empire resulted in a death toll of between 3.5 million and 6.5 million. 1816-1828 Shaka's Conquests Shaka, one of the most influential African Zulu warriors, led a war to unite the Northern Nguni people of the Zulu Kingdom. His conquests resulted in around 2 million deaths. 1850-1864 Taiping Rebellion The civil war in southern China was one of the deadliest military conflicts in history, with a death toll of an estimated 20 to 60 million. 1914-1918 First world war The first major world war left an estimated 8 million dead and 22 million severely injured. 1931 Floods in China Between 2.5 million and 3.9 million died. 1932-1933 Holomodor Famine This man-made famine in Ukraine led to between 2.4 million and 8 million deaths. 1939-1945 second world war Around 20 million soldiers and 40 million civilians died. 1944 Penicillin mass produced G. Raymond Rettew developed a technique to mass-produce penicillin, greatly reducing the number of people dying after amputations. 1946-1964 Baby boom The years after the war resulted in a baby boom in the West. The number of births in the US went from about 20,000 in 1944 to 26,000 in 1949. 1998-2004 Second Congo War The largest war in modern African history, involving eight African nations, led to the deaths of 5.4 million people due to disease and starvation.