Command/Sleep

=Command: SLEEP= Syntax: "sleep"

The sleep command forces your team to camp where they stand. They might be bothered by an approaching enemy, but they might actually get some sleep and recover from any injuries. Either of those events can be the desired outcome, depending on your current status.

Recovery
Sleeping to recover from combat is certainly useful, rather than consuming healing potions or the like. If you need sleep, its best to do so in a safe place. Many parts of the wild will get you little if any rest.

Camping
Sleeping is also a useful method for forcing the game to give you more encounters with your enemies. Sleeping repeatedly in one location out in the wild, also known as "camping", will eventually spawn enemies you can fight. You can find a location that is likely to spawn whatever enemy you wish to fight, and camp there for however long it takes to bring you joy.

Camping in marsh, for example, will very likely spawn monsters that can be subdued and sold for great profit.