If there's a concise, non-militaristic name for a team with a specific, urgent, short-term objective holed up in a room together, I'd love to hear about it. "Strike team" and "war room" just work really well.
They were not this. They were Walter Mitty fantasists. That’s what happens when people take the “business is war” mindset too seriously.
How about “the priority one support team” in “meeting room A”?