Complex sentence: In the Chickasaw Campaign of 1739, Bienville summoned more than 1,000 troops to be sent over from France, the entire army ascended the Mississippi River to the site of present-day Memphis, Tennessee, and attempted to build a military road westward toward Chickasaw villages.
Split into simpler sentences: In the Chickasaw Campaign of 1739, Bienville summoned more than 1,000 troops to be sent over from France. Bienville's army ascended the Mississippi River to the site of present-day Memphis, Tennessee, and attempted to build a military road westward toward Chickasaw villages.