X-Men - Operation Zero Tolerance (1997)

Collects Generation X #26-31, X-Force (1991) #67-70, X-Men (1991) #65-70, Uncanny X-Men #346, Wolverine (1988) #115-118, Cable (1993) #45-47, X-Man (1995) #30.
A rogue faction of the U.S. government, backed by powerful international forces and led by the man known only as Bastion, is about to launch a massive strike against the X-Men. The strike has one goal: the extermination of the entire mutant race. This is the X-Men's darkest hour.