A/the parting of the ways
Definition 1 of 1
Pro Tip 1/3Symbolic Moment
This phrase often symbolizes a significant change or turning point in relationships or group goals. 
After the election, there was a parting of the ways within the party's leadership.
Pro Tip 2/3Emotional Weight
May carry emotional weight, suggesting sadness or regret over the separation. 
The band's farewell concert marked a parting of the ways that left many fans teary-eyed.
Pro Tip 3/3Amicable Usage
Can imply a mutual, sometimes amicable decision to separate rather than a conflict. 
The founders announced an amicable parting of the ways, each pursuing different ventures.