original answer by ID1975909698 > exchange of tribe
Michale A Hogg has said: 'intergoup relations is how people feel
and act towards people in other groups'. For example two rivalring
gangs or sports teams.
You can replace the word 'group' into a 'national' or 'ethnic'
so the term becomes graspable. 'International relations' is clear.
Same applies to inter-tribe relations.