Chapter 1- Mapping: The Louisiana Purchase
On April 11, 1803, during negotiations with James Monroe and Robert Livingston over the purchase of portions of Florida and New Orleans, the French foreign minister stunned the two American statesmen by offering them all of Louisiana or nothing.

Chapter 2- Mapping: Master Map

Chapter 2- Mapping: The Pacific Northwest (Boundaries and Regions)
The path taken by the Lewis and Clark expedition east of the Rocky Mountains moved through land newly acquired by the Louisiana Purchase of 1803. When they crossed the continental divide in September of 1805, they began a journey through the disputed Northwest Territory.

Chapter 3- Mapping: The Pacific Northwest (Mountain Ranges)
The continental divide, an imaginary line running along the crest of the rocky mountains, separates waters that flow into the Atlantic Ocean and Gulf of Mexico from those that flow into the Pacific Ocean. To the Corp of Discovery and David Thompson, crossing the divide was an extremely significant achievement for many reasons.

Chapter 4- Mapping: The Pacific Northwest (River Systems)
To the early explorers and pioneers, the river systems of the Pacific Northwest were of extreme importance. They provided an efficient and reliable means of travel through otherwise uncharted and densely forested territory.

Chapter 5- Mapping: The Pacific Northwest (Indian Tribes)
The land that Pacific Northwest bound explorers passed through was home to many Native American cultures. Lewis and Clark encountered nearly 50 distinct tribes during the course of their journey.

Chapter 6- Mapping: The Pacific Northwest (Forts and Missions)
The land that Pacific Northwest bound explorers passed through was home to many Native American cultures. Lewis and Clark encountered nearly 50 distinct tribes during the course of their journey.

Chapter 7- Mapping: The Pacific Northwest (Pioneer Travel Routes)
As explorers and pioneers charted the Louisiana and Pacific Northwest territories, they often built forts, trading houses and missions along the trail. These structures would serve early settlers by providing them protection, a place to trade goods, and by serving as pockets of ‘civilization’ amid the vast expanse of ‘wild’.

Chapter 8- Mapping: The Pacific Northwest (Parks and Wildlife Refuges)
Prior to embarking on their long journeys, early American explorers often received training in the biological sciences. As they traveled, they put this training to use, identifying new species of plants and animals while providing detailed drawings and descriptions as well as names.

Chapter 9- Mapping: The Pacific Northwest (Today)
The routes traveled by early Northwest explorers remain important today. Pioneers and settlers followed the early explorers and recognized the bountiful resources noted in the diaries and journals.