Section 0 was an elite fleet of admirals and captains in Starfleet. It dealt in secret and in its time of need, it fought a great war until the end. Since that great war it had not been seen or heard of since. Most of its members were killed off in counter attacks against the enemies in other fronts for Starfleet. Only five members remained.
Section 0 was created by Vice Admiral Jack Sparrow Lead by several other members including him although, Section 0 was on par with Section 31 in technology and tactics as of the 24th Century before they were whiped out, They fought in almost every major engagement their ranks were some 200 strong until the great war.
Section 0 used Experimental Technology such as Protonic weaponry and Temporal technology.