The stock market crash and lost resources due to the war
Muhammad bin Qasim conquered the Sindh and Indus Valley, which made South Asian societies(e.g Sindhis)into contact with Islam
If I remember correctly it was Andrew Johnson. Hope i could help!
Well according to a website, it says that "<span>The </span>origin of Buddhism<span> points to one man, Siddhartha Gautama, the historical </span>Buddha, who was born in Lumbini (in present-day Nepal) during the 5th century BCE."
and the central beliefs of buddhism, you could check out this website, http://www.infoplease.com/encyclopedia/society/buddhism-basic-beliefs-practices.html