The Trans-Mississippi International Exposition was a world's fair held in Omaha, Nebraska from June 1 to November 1 of 1898. Its goal was to showcase the development of the entire West, stretching from the Mississippi River to the Pacific Coast. The Indian Congress was held concurrently.

The Post Office Department issued a series of nine postage stamps to mark the Exposition, each depicting a Western scene. Now known as the Trans-Mississippi Issue and considered among the finest stamps produced by the US, they are highly prized by collectors; a complete unused set is worth about US$5,000.

External link

• The Omaha Public Library's Page on the Exposition