Bivouac (noun)

A temporary camp, typically without tents or cover, used by soldiers or hikers.

Origin:

From french bivouac, from swiss german biwacht, from bi- + wacht ("watch").

Examples:

1. We set up a bivouac for the night.
2. The soldiers set up a bivouac in the open field.
3. The hikers made a bivouac by constructing a shelter out of branches and leaves.
4. The bivouac was a simple, makeshift camp without any tents or covering.
5. The bivouac was a temporary camp and it was used for the night.