Originally posted by quadinhonic_II
I think what its saying is that the Levi\Fenris was the only cruiser in OPERATION at the time of the GREAT WAR. Its says Great War, not the TV war.
From tbl entry (FS2)
XSTR("The GTC Fenris class is the aging stalwart among the Alliance's warships. Before the Great War, the Fenris was Terran Command's only class of cruisers. During the war, Terran Command decided to build a second line of cruisers, the Leviathans, to free the Fenris from escort and guard duties. Fenris cruisers have fought in virtually every theatre of operation. These fast, versatile cruisers pack enough punch in their 260-meter-long hulls to go toe-to-toe with any enemy cruiser. The Fenris's speed and maneuverability make it a good choice for strike missions.", 3045)
I think 'Great War' should read 'T-V War' or such, based on the description. Also, the fact that the Leviathan was designed when the GTA realised the war was going to last longer than a few months, suggests that the Fenris (effectively it's ancestor) must have been in service from the start of the war.
Oh, and I'd say that a corvette is improbable for the T-V war simply because it's a fairly modern ship design (FS2 era)... it's main purpose seemingly to take on the stronger Shivan vessels (as far as the GTVA is concerned. The Shivan classes are really only based on apparent purpose and size). There's no good reason that the GTVA would have a ship larger than a Fenris, yet less battle-effective. Unless it carried fighters, which would make it, IMO a light carrier type craft.
Oh, and BTW - Hades, from what I read of the tech descriptions / FSrefbible, the Leviathan was conceived very early on in the war, probably after only a few months when no apparent breakthrough was immenent.