He was to lead efforts to develop mining in the Illinois Country.

French traders were active in the region throughout the middle 18th century when it was part of the Illinois Country.

On December 3, 1679 a party of twenty-men started out for the Illinois Country.

He spent the next several years establishing posts and trade throughout the Illinois Country.

A second, and secret, set of orders allowed him to invade the Illinois Country.

The name is derived from the early French settlers of the Illinois Country.

It was a major French colonial town of the Illinois Country.

The trading posts in the Illinois Country concentrated mostly on the fur trade.

They had migrated about 1750 from the Illinois Country.

The Illinois Country, which included what is now Missouri, was also to be part of the charter.