https://lewisandclarkjournals.unl.edu Aug 1, 2007 "Welcome to the Journals of the Lewis and Clark Expedition Online. This website makes available the text of the celebrated Nebraska edition of the Lewis and Clark journals, edited by Gary E. Moulton. Moulton's edition—the most accurate and inclusive edition ever published—is one of the major scholarly achievements of the late twentieth century.... The site features the full text—almost five thousand pages—of the journals. Also included are a gallery of images, important supplemental texts, and audio files of selected passages plus Native American perspectives. With a focus on full-text searchability and ease of navigation, the Journals of the Lewis and Clark Expedition Online is intended to be both a useful tool for scholars and an engaging website for the general public." Center for Digital Research in the Humanities
https://history.state.gov/milestones/1784-1800/pickney-treaty Apr 8, 2018 "Spanish and U.S. negotiators concluded the Treaty of San Lorenzo, also known as Pinckney’s Treaty, on October 27, 1795. The treaty was an important diplomatic success for the United States....However, Spanish interests changed during the wars of the French Revolution. Spain joined the other European monarchies in war against France in 1793, but by 1794 Spanish forces experienced defeats in the Caribbean and Europe." United States Department of State
https://www.loc.gov/collections/louisiana-european-explorations-and-the-louisiana-purchase/articles-and-essays/the-louisiana-purchase Nov 14, 2023 "The Louisiana Purchase Napoleonic France Acquires Louisiana On October 1, 1800, within 24 hours of signing a peace settlement with the United States, First Consul of the Republic of France Napoleon Bonaparte, acquired Louisiana from Spain by the secret Treaty of San Ildefonso. To the distress of the United States, Napoleon held title to the Mississippi River and the port of New Orleans. With the signing of the Treaty of San Ildefonso, Napoleon sought to reestablish an extended French maritime and colonial empire in the West Indies and the Mississippi Valley....Rumors of the secret retrocession of Louisiana from Spain to France prompted anxiety in Washington city...Jefferson realized that if France claimed Louisiana, Great Britain would try to capture and occupy the region." Library of Congress Collections
https://history.state.gov/milestones/1801-1829/louisiana-purchase Apr 8, 2018 "The Louisiana Purchase encompassed 530,000,000 acres of territory in North America that the United States purchased from France in 1803 for $15 million...France acquired Louisiana from Spain in 1800 and took possession in 1802, sending a large French army to St. Domingue and preparing to send another to New Orleans. Westerners became very apprehensive about having the more-powerful French in control of New Orleans: President Thomas Jefferson noted, “There is on the globe one single spot, the possessor of which is our natural and habitual enemy. It is New Orleans.” United States Department of State
https://www.nps.gov/miss/riverfacts.htm is a page maintained by the National Parks Service and provides a lot of basic facts about the significance of this river.
https://catalog.archives.gov/id/2127339 is a 1848 map that "accompanied President James K. Polk's annual message to Congress in December 1848. It represents Polk's conception as a Southern Democrat of how to divide up the new territory acquired through the Treaty of Guadalupe-Hidalgo. It became the starting point of debates in Congress over slavery and westward expansion."
https://www.pbs.org/lewisandclark/inside/saca.html explains background about this important member of the Corps of Discovery.
https://guides.loc.gov/indian-removal-act May 14, 2019 "The Indian Removal Act was signed into law by President Andrew Jackson on May 28, 1830, authorizing the president to grant lands west of the Mississippi in exchange for Indian lands within existing state borders. A few tribes went peacefully, but many resisted the relocation policy. During the fall and winter of 1838 and 1839, the Cherokees were forcibly moved west by the United States government. Approximately 4,000 Cherokees died on this forced march, which became known as the "Trail of Tears." Library of Congress Research Guides
http://www.nationalgeographic.com/lewisandclark/ has an interactive journey log, expedition records, and photos of the expedition.
http://lewis-clark.org contains a vast archive of primary and secondary sources documenting Native Nations, journal logs, and information about the expedition.
http://www.pbs.org/lewisandclark is a PBS site that has Archives, an Interactive Trail Map, and other information about the entire trip.
http://en.wikipedia.org/wiki/Missouri_River provides a great deal of information about the history of the river and explorers who attempted to find the Northwest Passage.
http://en.wikipedia.org/wiki/Lewis_and_Clark_Expedition page has a lot of great background information about the explorers, expedition, and the exploration of the Louisiana Territory.
https://education.nationalgeographic.org/resource/lewis-and-clark-trail Oct 19, 2023 "In 1804, Meriwether Lewis and William Clark set out on a two-year journey to document the newly purchased Louisiana Territory. On the way to the Pacific, they collected information on plants, animals, and about some of the Native American nations living in the area." National Geographic Education Resources
http://lewisclark.net provides detailed timelines of the expedition and a lot of succinct sections of many of the journal entries.
http://www.archives.gov/education/lessons/lewis-clark shares a variety of primary and secondary sources that provide background about the journey through the Louisiana Territory.
http://www.history.com/topics/native-american-history/sacagawea is a page on the History Channel website that explores her life and how it was connected with the Lewis and Clark Expedition.
https://www.imax.com/movie/lewis-and-clark-great-journey-west Apr 20, 2002 "It was the dawn of a nation - a time before the American West became known as the frontier, and little was known about what lay within. Two captains, courageous in spirit and unyielding in their dedication to their mission, led 31 people, including one woman and her infant son, to the Pacific Ocean and back. Audiences will experience the danger and beauty of the unknown West as it unfolded before the eyes of Lewis and Clark." IMAX
https://www.nps.gov/mnrr/learn/historyculture/the-lewis-and-clark-expedition.htm Sep 16, 2020 "Thomas Jefferson was elected to the presidency in 1800. Two years later, he decided to organize an official, government-sponsored expedition to explore the upper reaches of the Missouri River and by so doing to find the elusive Northwest Passage to the Pacific Ocean. He chose Meriwether Lewis, his personal secretary, to lead the expedition. In January 1803, Lewis traveled to Philadelphia for intensive training with the leading American scientists, learning the use of scientific instruments, the rudiments of surveying, medicine, natural history and ethnology. In June 1803, Lewis asked William Clark, a friend from his former army service, to serve as co-leader of the expedition. Clark gladly agreed." National Park Service
https://lewisandclarktrail.com Jun 9, 2025 Lewis and Clark's great journey west begins in Washington D.C. and zigzags along the eastern seaboard encompassing the states of Delaware, Maryland, Virginia, and Pennsylvania; then proceeds through Ohio, West Virginia, Kentucky, Indiana, Illinois and Missouri. The trail then meanders through the great plains of Kansas, Nebraska, Iowa, South Dakota, North Dakota and continues through the mountains and the valleys of Montana, Idaho, Washington, Oregon, concluding at the Pacific Ocean. The Lewis and Clark Trail is a cultural destination that covers over 4,600 miles, crosses four time zones, and showcases some of the most beautiful and rugged areas of America. The Lewis and Clark Trail
https://www.youtube.com/watch?v=sMh8RCqJf9U Feb 7, 2013 When the French offered up the Louisiana Territory, Thomas Jefferson knew this real estate deal was too good to pass up. How did the President justify the purchase that doubled the size of the United States? Judy Walton provides President Jefferson's reasoning. View full lesson: https://ed.ted.com/lessons/the-audacity-behind-the-louisiana-purchase-judy-walton TED-Ed
https://www.youtube.com/watch?v=PnT0k9wdDZo Published on Aug 8, 2013 In the early 19th century, a young Agaidika teenager named Sacajawea was enlisted by explorers Meriwether Lewis and William Clark to aid her husband Toussaint Charbonneau as a guide to the Western United States. Karen Mensing debunks some of the myths that surround the familiar image of the heroic woman with a baby strapped to her back and a vast knowledge of the American wilderness. View full lesson: https://ed.ted.com/lessons/the-true-story-of-sacajawea-karen-mensing.
https://www.youtube.com/watch?v=sN3G88dPk4c Published on Oct 2, 2014 Lewis and Clark first met Sacajawea and her French husband Toussaint Charbonneau in the Dakota Territory. The couple joined the expedition, acting as translators and guides. From: AERIAL AMERICA: The Dakotas
https://www.youtube.com/watch?v=zipu94cIgNo Published on Aug 31, 2014 On August 31, 1803, Meriwether Lewis, later joined by William Clark, pushed off from Pittsburgh harbor, heading west on a journey that would make history. Lee Cowan reports.
https://www.youtube.com/watch?v=bYaTSImrDxc Published on Oct 11, 2016 Jefferson sends Monroe off to find a little getaway property for the United States. In the process, they double the size of our country!
https://www.youtube.com/watch?v=_ww905YIpeM Published on May 24, 2019 "Sacagawea" was produced by Questar, Inc. who possesses all distribution rights in perpetuity. Written and Directed by Mr. Rolf Forsberg. She was an expectant mother, but she endured every hardship these seasoned soldiers experienced. Without her, the Corps of Discovery would have failed. This program re-enacts her journey in her own words. Taken captive as a child during a raid, adopted into the tribe of her captors, and then married off, her adventures have only just begun. After Lewis & Clark journey to her village on assignment from President Jefferson, Sacagawea joins the expedition in seeking a northwest passage to the sea. Digging up edible roots and negotiating for horses, she saves the Corps of Discovery, time and time again.
https://www.pbs.org/video/scout-people-culture-journey-of-sacagawea Aired Mar 10, 2003 This program explores the life of Sacagawea from the rich oral history of the Augadika Shoshoni, Mandan Hidatsa and the Nez Perce Native American tribes, as well as the historical account taken from the journals of the Corps of Discovery.
https://www.youtube.com/watch?v=YSs9xaDUwO0 Published on Dec 1, 2020