system
Given the following post, respond as if you're commenting on Reddit:
human
[Attack on Titan Anime] Why don't the Scouts do their expeditions at night when the Titans are lethargic/sleepy?

**[I've only seen the anime, so no spoilers from the manga please!! If it gets explained in the manga, but contains other spoilers, please just say so and mark it as such]**

So from Hange's tests, we see that the Titans become lethargic and even immobile under cover of darkness. Why don't the scouts do their expeditions at night?
gpt
Simply because it is dark. They can't see more then a few meters around them even in full moon light which would cripple the scouting formation. Also the horses would be unable to see and would be much more likely to injure themselves and that would leave the scout stranded. Remember that it's around 100km between the wall, a ride that far would take several days even in the best of conditions. With hundreds of soldiers, supplies and enemy threat the going is a lot slower. Finally even though it's dark some titans stay somewhat active for hours after losing the light. To fight them in the dark with next to no warning is an absolute worst case scenario.