During December, the weather north of Danang (and the Hai Van Pass) can be cool and rainy. January through March are optimal months to travel the length of Vietnam (combined with humidity, it is not as cool as the chart below reflects). However, Sapa does not thaw until around the first week of March.
During the Cambodian Genocide of 1975-1979, approximately 1.7 million people lost their lives (21% of the country's population), it was one of the worst human tragedies â¦ of the 20th century. 23 people found this useful.
Bubonic plague killed 137 million Europeans. European diseases such as smallpox decimated Native American populations. One quarter of delivering mothers died of infections carried by hands and instruments of nurses and physicians. Influenza epidemic of 1918 killed over 25 million people worldwide.