blue-on-blue
Allies hitting allies
Blue-on-blue describes military fire accidentally directed at one's own forces—friendly fire.
The term comes from war games and maps where blue traditionally marks allied units: Three soldiers died in a blue-on-blue incident.
It's used as both adjective and noun, primarily in British military contexts.
Killing one's own brother
- incidentA distinct event
- casualtiesThose killed or wounded
- coalitionTemporary alliance for action
- misidentificationWrongly recognizing something
combat · accidental · strike · airstrike · troops · allies · NATO · engagement
Practice match with contact
- intrasquadWithin one team
- practiceRepeated work toward mastery
- teammatesFellow squad members
- trainingDeveloping abilities through practice
match · drill · exhibition · preseason · internal · competition · squad · roster
fratricide
Killing one's own brother
- incidentA distinct event
- casualtiesThose killed or wounded
- coalitionTemporary alliance for action
misidentification · combat · accidental · strike · airstrike · troops · allies · NATO · engagement · coordination
scrimmage
Practice match with contact
- intrasquadWithin one team
- practiceRepeated work toward mastery
- teammatesFellow squad members
training · match · drill · exhibition · preseason · internal · competition · squad · roster · offense