[CT27]

I was thinking of writing a FS story but I wasn't sure about a piece of info.  How many warships would be attached to an Erebus?  Same question for a Titan; how many (what kind of) warships would be in its group?

[AdmiralRalwood]

The Erebus and the Titan are deployed together; each Erebus has a corresponding Titan, and the two are the only destroyers in the battlegroup. For instance, the Atreus and the Imperieuse, or the Orestes and the Temeraire. You may want to check out the Blue Planet Orders of Battle wiki article for a list of known GTVA warships (and which battlegroup they're in) in BP canon.

[The E]

A standard GTVA Battlegroup consists of:
-2 (sometimes 1) Destroyers. Fleet doctrine calls for one line combat ship (Orion or Erebus) to be paired with one carrier (Hecate or Titan); however, most BGs currently deployed make do with two Hecates.
-9 to 10 Corvettes, 6 to 8 Cruisers as escorts and patrol craft
-2 logistical support vessels
-Other support vessels (AWACS craft) attached as necessary

Do note that this is an "ideal situation" Order of Battle: It's what the GTVA would like to deploy everywhere, but for obvious reasons, they can't always make that happen. It should be true for any Battlegroup actively deployed into combat though.

[CT27]

In a number of campaigns I've played, Vasudans tend to use the term "Battlegroup" for organized groups of warships centered around destroyers while Terrans use the term "Fleet."   Are they the same or is there actually a difference between those two?

[AdmiralRalwood]

In BP, at least, battlegroups are sub-fleet units. For example, the 5th Fleet consists of the 14th and 15th Battlegroups.

[The E]

In a number of campaigns I've played, Vasudans tend to use the term "Battlegroup" for organized groups of warships centered around destroyers while Terrans use the term "Fleet."   Are they the same or is there actually a difference between those two?

After FS2, the terran fleet was reorganized along lines similar to the vasudan one, as the vasudan battlegroup is a more flexible organization than the terran fleets were. In the current terran organization scheme, a "fleet" is a mostly administrative thing, dealing with things that are not directly related to combat duties; at the strategic level, the battlegroup is the largest formation considered practical.

[Erebus Alpha]

Does that mean that Vasudan battlegroups also adhere to the two destroyer + multiple corvette/cruiser escort schema? Or does that mean that the Vasudans are so good at supply management and logistical support that they can just shuffle warships in and out of battlegroups at will?

The events in act 2 seem to hint at the Vasudans' supreme logistical proficiency. They seemed to have no trouble rapidly deploying the Pesedjet and Shepsekaf into Sol, despite that relations between Terrans and Vasudans had grown increasingly hostile. By contrast, we learned in act 3 that Steele was still feeling the loss of the Agincourt, even with Vasudan assistance.

The Terran half of the GTVA seems much less logistically robust than the Vasudan fleet, and I'm curious how that impacts the composition of Vasudan battlegroups.

[The E]

The Terran half of the GTVA seems much less logistically robust than the Vasudan fleet, and I'm curious how that impacts the composition of Vasudan battlegroups.

The Vasudans also have a stronger economy overall and are only supporting a single Battlegroup in the Sol theater. In addition, the pre-invasion planning assumed a quick surrender of the UEF followed by an occupation, not over a year of sustained combat operations; Given that the GTVA is very reluctant to reduce its border watch, it should not be surprising that the terran logistics net is starting to be strained.