Lewis and Clark were traversing uncharted territories, so naturally, they had no idea what to prepare for or what to even expect.
Explanation: As it mentioned, Lewis and Clark were told to keep a detailed journal of their encounters, explaining every detail of what they experienced on the journey. This specific entry is a perfect example of some of the hardships that they had to face. The writer mentions a crazed wild Buffalo that charges towards their men as they slept at night. If it weren't for the dog who had been keeping watch at the time, the Buffalo wouldve caused serious damage to their expedition. Most of the things that these men had to face were hard and dangerous, and the Buffalo charging towards them in the late night wasn't even half of it.
