Rivers can become waterfalls; wrecking your boats, destroying your equipment and supplies, and/or killing your crew.
Unfriendly natives could kill your crew, steal your supplies, or just misdirect you into dangerous situations.
Unknown illnesses could wreak havoc with your crew's abilities to continue, or it could kill them outright.
There was a disease in the Lewis and Clark expedition
thomas jefferson told them to go on the expedition
The expedition was started by President Jefferson and it was to explore the Missouri River.
Yes someone did get lost on the Lewis and Clark expedition.
The name of the slave who accompanied William Clark on the expedition was York.
they encountered tons of bears and fish. and even deer. and they also encountered the batman
Falklands Expedition happened in 1831.
Villasur expedition happened in 1720.
Expedition of Qatan happened in 625.
Hidden Expedition happened in 2007.
Lamellerie's expedition happened in 1806.
Forbes Expedition happened in 1758.
Narváez expedition happened in 1527.
Expedition Everest happened in 2006.
Jackson Expedition happened in 1863.
Expedition Amazon happened in 1983.
Crawford expedition happened in 1782.