That’s interesting. There’s probably something to be said for having a period of decompression, especially in the company of the soldiers you shared in combat with. Might not even need to be very long. Just a time to be together and hash out all the stuff you’ve all been through, before regular life floods back in.
If you check your Old Testament describing how the Israelites conquored Canaan, you will discover that soldiers were required to spend a several day “purification” period after a battle before they could join the tribe.