internal factional violence; infighting within a student group
Originally used for violent clashes between factions of the same student movement, especially in the 1960s–70s Japanese New Left. Now can refer to any internal strife within an organization, but still carries a strong activist/historical connotation.
Internal factional violence broke out frequently in the student movements of that time.
The organization's activities are stalled due to infighting.
Abbreviation of 内 (uchi, 'inside') + ゲバ (geba), from German Gewalt ('violence'). Coined during the Japanese student movement era.