In the places I’ve worked, a war room was always the place where we cut the bleeding and revert the system to a working state. Never was the RCA the intended outcome of a war room, though we’d often reach the RCA in the silence of the meeting bridge while something deployed/rolled back.

Root cause analysis is definitely not a group activity, it’s best done in a place where one can have complete focus.

However, cutting the bleeding requires plenty of communication, weighing different options, having a higher-up sign off on a tradeoff, getting our ops team to coordinate towards some common goal, monitoring the recovery… etc.