Gold was discovered in the Yukon Territory in 1896.
In 1897, thousands of prospectors came to the Yukon.
This situation took place in the Canadian Yukon where the winters are very harsh and it requires the best preparations to be outdoors. Also that this was during the Klondike gold rush of 1898 in which people from warm southern clime went to. The southern americans were unprepared enough, both physically and psychologically to deal with these conditions.