Those first six would of course be:
USS Galaxy
USS Challenger
USS Yamato (lost)
USS Enterprise (lost)
USS Odyssey (lost)
USS Venture
The Yamato was lost thanks to an ancient virus in "Contagion," the Odyssey was destroyed to emphasize the dangers of the Dominion by a kamikaze Jem'Hadar, and the Enterprise was destroyed by a pair of Klingon sisters who bugged Geordi to learn the ship's shield frequency because the producers wanted a new Enterprise.
Geordi commanded the Challenger in the "Timeless" (VGR) future, but its registry indicates it was built (or at least contracted) second. The Venture and Galaxy both appeared on DS9. I believe Galaxy suffered a bit of damage in "Tears of the Prophets" (DS9) but wasn't destroyed at least on screen.
Logic would probably indicate that Starfleet would have finished at leat three more of the six to replace the other three before the war even started. For my money, they probably just went ahead and finished all of them, but rushed them all as the DS9 TM states. MA suggests that at least nine were shown in "Favor the Bold" and "Sacrifice of Angels" on DS9, and five were in the fleet at Earth in "Endgame." (VGR)
One could conceivably argue that there were "really" no more than nine total so long as no more than nine have been seen in a single scene, but I fiind this unlikely. Additionally, I find it unlikely that five of them, if there only were nine, would all coincidentally be present at Earth in "Endgame."
USS Galaxy
USS Challenger
USS Yamato (lost)
USS Enterprise (lost)
USS Odyssey (lost)
USS Venture
The Yamato was lost thanks to an ancient virus in "Contagion," the Odyssey was destroyed to emphasize the dangers of the Dominion by a kamikaze Jem'Hadar, and the Enterprise was destroyed by a pair of Klingon sisters who bugged Geordi to learn the ship's shield frequency because the producers wanted a new Enterprise.
Geordi commanded the Challenger in the "Timeless" (VGR) future, but its registry indicates it was built (or at least contracted) second. The Venture and Galaxy both appeared on DS9. I believe Galaxy suffered a bit of damage in "Tears of the Prophets" (DS9) but wasn't destroyed at least on screen.
Logic would probably indicate that Starfleet would have finished at leat three more of the six to replace the other three before the war even started. For my money, they probably just went ahead and finished all of them, but rushed them all as the DS9 TM states. MA suggests that at least nine were shown in "Favor the Bold" and "Sacrifice of Angels" on DS9, and five were in the fleet at Earth in "Endgame." (VGR)
One could conceivably argue that there were "really" no more than nine total so long as no more than nine have been seen in a single scene, but I fiind this unlikely. Additionally, I find it unlikely that five of them, if there only were nine, would all coincidentally be present at Earth in "Endgame."