They also need to be involved in your move. They will be a valuable resource of experience and information. It also can depend on world situations and how they affect your command. Those involved in relocation need to discuss this issue, particularly if travel has not been a part of the previous job. We have never been outside of the United States.
Adjustment is different for every individual.
Some people adjust faster than others to a foreign culture. Prior to relocation, NSAP training and efforts to learn about a foreign country will help. Once you have moved, getting involved in the community is a major step to adjustment. It may last a few days or several weeks. Usually it is triggered by an incident that reminds you of home.