Mohenjodaro. Since the first discovery of this civilization in 1920-21 at Harappa in the Indus Valley, hundreds of sites spread over more than a million square kilometres in the Indian subcontinent have been excavated, many of these are in Northern and Western India.
The immediate cause for World War 1 was the assassination of the Archduke Franz Ferdinand of Austria and his pregnant wife Sophie. Archduke Franz Ferdinand of Austria was the nephew of Emperor Franz Josef and heir to the throne of Austria and Hungary.
However, the triggers for starting World War 2 were the invasion of Poland by Nazi Germany in 1939 and the invasion of China by Japan in 1937.This led to most nations declaring war or armed resistance against Germany, Japan and their allies. More Articles :ltimately one can say that World War 2 started because of nationalistic fervor, unresolved issues from World War I and the reaction of the United States to the expansion of the Japanese Empire in the Far East in 1930s.