People who worked in factories lived together in small houses that were full to the brim and the idea was to go work while another sleeps, and then you sleep when others work.
The Irrawaddy River valley most impacted the formation of the Pagan Kingdom. The Kingdom itself in its earliest phases was but a small settlement that had entered into the valley from another kingdom, the Kingdom of Nanzhao, in the 9th century. They moved onward from this valley, slowly annexing neighboring settlement up until the 11th century. At this point King Anawrahta officially founded the Pagan kingdom, annexing all these settlements into one big kingdom.
Pretty sure it is "gold", you know with the California Gold Rush, and 49ers and all that. :)
The incident that allegedly led to the Sepoy rebellion was: The implementation of Draconian law.
In draconian law, someone that did a small mistake will be objected by heavy punishments. The People of sepoy saw this as an insult to all values that they held and caused them to rebel.