The exhibition in Portland, Oregon (USA) celebrated the 100th anniversary of Lewis and Clark’s expedition.
The Lewis and Clark Expedition from August 31, 1803, to September 25, 1806, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase.
It was not exactly an Universal exhibition but 18 nations and 3 colonies participated including Japan who exhibited more than 13000 items.0