This also happens heavily with repatriation for any unexpected reason. I'm trying to find the document on it, but there are pretty serious studies about re-ente

This also happens heavily with repatriation for any unexpected reason. I'm trying to find the document on it, but there are pretty serious studies about re-entering society after a major cultural shift, with many of the difficulties relating to difficulty connecting with the regular population in regards to the experiences you had abroad since most lack the frame of reference. The unexpected part of it just is a shock to your system and it can take months before you acclimate back to your native environment just due to all the strange expectations one has. I was forcibly repatriated due to a visa issue a few years ago, and I feel into a deep depression as a result. I was not a pleasant person, and I couldn't figure out why I was so miserable. It never occurred to me that, after having traveled and worked across the globe, that the simple fact of an unexpected trip home would be the source of a huge wave of depression. I definitely burnt a few bridges as a result of this, most of which I don't think I can repair. The State Department has a very good page on this, dubbing it "Reverse Culture Shock" [1] I remember reading over this page and being amazed as to how succinctly what I was experiencing had been put into words, and it hit me very hard, especially since overall I felt I had acclimated well to life abroad in a non-English speaking country. Having all of that hard work just suddenly stripped away and being forced back into a place that no longer felt like a home for me was very hard, and it weighs heavily on me even today. That lack of connection between people is incredibly devastating, and the GP post about re-entry is quite true, in my experience. [1] - https://www.state.gov/m/fsi/tc/c56075.htm https://www.state.gov/m/fsi/tc/c56075.htm