Vanguard Fleet

The Vanguard Fleet was a military defense organization of the Dominion. Its original headquarters were a fleet of ships in the middle of space, Odo's Fleet, before a permanent office was established on Deep Space 9, a Federation starbase in the B'hava'el system. The Vanguard Fleet's flagship was the aptly named Odo's Flagship. 

History and specifications
In 2410, the Vanguard Fleet was the personal detachment of Dominion soldiers and starships loyal to Founder Odo, a Changeling. When the Hur'q Swarm began a campaign of destruction across the Dominion's space in the Gamma Quadrant, Odo's affinity to life as a solid earned him a place in command of this fleet, in an effort to combat the Hur'q Invasion. ( in-game Vanguard starship description tooltip)

The Fleet's personnel consisted of Odo himself, Vorta, Gamma Jem'Hadar and Jem'Hadar Vanguard, a new breed of Jem'Hadar. 

After he lured the Hur'q to Bajor to gain military support by the Alpha Quadrant Alliance, Odo was invited to a conference on DS9. Odo advised the Allies that the entire Dominion fleet, save for the Vanguard Fleet, had been destroyed. ({{sTO|sub={{stod|Gamma Quadrant|Storm Clouds Gather}})

Leadership

 * Founder:
 * Ambassador Odo
 * Vortas:
 * Weyoun-10
 * Loriss-3
 * Jem'Hadar:
 * Honored First Dukan'Rex

Ranks and titles
Ranks of the Jem'Hadar Vanguard Fleet:
 * Fifth (equivalent to tier-1, cadet (Starfleet)/warrior (KDF)/citizen (RRF))
 * Fourth (~ tier 2, lieutenant)
 * Third (~ tier 3, lieutenant commander/centurion)
 * Second (~ tier 4, commander/subcommander)
 * First (~ tier 5, captain/commander)
 * Master First (~ rear admiral, lower half/brigadier general/subadmiral I)
 * Senior First (~ rear admiral, upper half/major general/subadmiral II)
 * Elite First (~ tier 5-U, vice admiral/lieutenant general/vice admiral)
 * Revered First (~ admiral/general/admiral)
 * Honored First (~ fleet admiral/dahar master/fleet admiral)

Resources
The Vanguard Fleet originally relied on designs developed by the Dominion in the 24th century but had begun to conceive ships of its own, with carried "Jem'Hadar Vanguard" in their class designation. 

Auxiliary craft class

 * (tier 1)

Dominion starship classes

 * Jem'Hadar attack ship (tier 5/tier 5-U)

Vanguard starship classes

 * Jem'Hadar Vanguard temporal warship (tier 6/fleet tier 6)

Significant bases

 * Odo's Fleet
 * Deep Space 9

Species diversity
While the leadership was recruited from Founders and Vorta, the soldiers derived from baseline Jem'Hadar and the new, improved Jem'Hadar Vanguard.