Secondment
Secondment is the temporary assignment of a member of one organization to another organization. In some jurisdictions, (e.g., India) such temporary transfer of employees is called "on deputation". The term is particular to Great Britain and Commonwealth countries.
In the Soviet Union, such reassignment was called Commadirovki and denotes career-related trips outside of work. For example, the 1967 comedy Kidnapping, Caucasian Style takes place while its protagonist Shurik is on secondment to Caucasus in order to record indigenous folklore.