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.
In Europe, the war began with Hitler's attack on  Poland, September 1st, 1939. Britain and France had defense  treaties with Poland regarding a possible German attack, and  declared war on Germany two days later.  The US was drawn into the war late in 1941 after Pearl Harbor.owever, it is officially accepted that World War 2 â¦ started when German troops invaded Poland on 1 September 1939. The United States entered the conflict after the Japanese attack on Pearl Harbour on 7 December 1941.