fence-mending
US /ˈfensˌmen.dɪŋ/
UK /ˈfensˌmen.dɪŋ/

1.
the act of restoring good relations between people or groups, especially after a disagreement
:
•
The diplomat engaged in some serious fence-mending after the international incident.
•
His visit was primarily for fence-mending with former allies.