Anyway, the TV War. I'm ignoring any history created by Eishtmo or the TV War people and focussing solely on canon data, and drawing my own conclusions, so we don't know much about it - in fact, with the exception of a few tantalizing clues, we know hardly anything beyond the very broad strokes.
Finally, someone else that's willing to take a crack at this. I developed most of the 14 Year War stuff for story and campaign development, so much of it is less than trustworthy on the subject. Still, this doesn't mean I can't reevaluate much of it.
Anyway, let's discuss some of the issues:
One fault with this, systems like Ribos were mentioned to be heavily fortified. So, we may not have seen some of the heavier blockade type defenses in FS1 that were present in the period. (and useless against the Shivans)
Tombaugh Station was said to be a "fortress," which could mean that it just had a lot of ships, perhaps even an Orion, hanging around. There's no comments about the rest of the system, which could have had anything.
Much of the economy would be geared toward the production of material to support the war effort.
This seems relevant as it is commented that the war was putting severe economic strain on the GTA, and likely the PVE as well. So there was a signficant amount of resources going into the war, especially in the later years.
However I'm not very sure that the core systems were that unlikely to be assaulted during the T-V War. Remember that there were few defensive structures able to effectively hold a blockade during and before the FS1-era - no Mjolnir, nothing bigger than Watchdogs unable to scratch the paint of a destroyer. Which mean that blockades have to be held by a lot of capital ships and, given the inefficiency of capital-grade weaponry, with a significant fighter and bomber support. And ships able to carry fighter support were very few. I don't think either side was able to maintain that kind of blockade on many nodes at a time, meaning that only those close to the front line were actively defended.
Which means that any capital ship that successfully manage to run a blockade can potentially go quite far in enemy territory before being gunned down. Add to that the fact that you only have 4 jumps between Vasuda and Sol, and you'll see what I mean. Even if there was more than a dozen system explored at this time, the proximity between both core systems is what really makes very likely some skirmishes close to the home systems during the T-V war.
There are a lot of questions brought up here. Couple this with the almost complete lack of a Vasudan destroyer for most of the war, and the Orion possibly being in service for nearly the entire thing, one has to wonder
how the Vasudans prevented the conquest of their systems early on.
The obvious point is one Mongoose made: Destroyers are rare. There are 6 named Orions in FS1 and Silent Threat (Galatea, Bastion, Amadaus, Intrepid, Krios and Soyakaze) and 4 Typhons (Pinnacle, Hope, Prophecy and Anvil). Two other Terran destroyers, Eisenhower and Goliath, are named, but not specifically identifed as Orions, and then there's the Orion from FS2's opening cutscene which was explicately stated to NOT be the Galatea, nor is it any of the other named Orions, so that brings us up to 7 active Orions. The Shivans, likewise, have only 3 named destroyers (Eva, Tantalas and Lucifer), and then there's the Hades, which is another issue entirely.
So the GTA has 7 destroyers, two of which are close enough to each other to exchange pilots for a single mission early in the war. They did outnumber the Vasudans, but after the Vega Engagement, were less likely to do so (even 3 years later). So why not just go balls out and invade Vasuda itself?
The thought leads me to one small statement when talking about the Shivans:
Oddly enough, the Shivans don't seem to be interested in taking control of any planets in the systems, or gathering natural resources. Instead they seem to be focused on controlling individual jump nodes.
If taking and holding nodes were a normal part of the 14 Year War, why would this be considered odd? Maybe it's simply referencing the planetary conquest angle, but I think it's about the nodes. The conclusion I have is that it WAS considered odd, and that most of the war WASN'T about the nodes at all. Sure, they WERE important, they were bottlenecks and while taking control of a specific ones was important, it wasn't the focus of the work. Remember, there were Vasudans in Ross 128, a system that, relative to the frontlines, was BEHIND Sol itself.
With this in mind, I think we might safely conclude that the 14 Year War wasn't much of a space war, it was almost exclusively a GROUND war, fighting over planets. The fleet's job was to help cover ground operations, escorting transports to planets and between the systems. Assulting nodes, destroyer vs destroyer engagements, grand scale fighter battles were NOT what the fleet did normally. Operation Thresher doesn't counter this, it actually provides evidence for it as it seems to have been poorly planned and cost far more than expected.
The Shivan invasion, purely a fleet action, seems to have caught the GTA and PVE flatfooted and unprepared. Sure, we can say it's because of the tech gap and the Lucifer, but the losses quickly mount and it's only by luck that they survive the war at all. Hell, they didn't even have a decent space bomb until AFTER the Shivans appear. It also explains the dramatic change in the character of the fleet between FS1 and FS2, where fleet combat becomes MORE important than ever before. Beam weapons are developed, flak guns, ships specializing in anti-capital ship warfare and new classes of space bombs appear. Reaction to the Shivans, yes, but why not have this kind of thing as a reaction to the Vasudans more than 40 years ago?
I'm going to say because it was a completely different kind of war, a ground war, and the fleet was just kind of watching over the war and particpating on a limited level. Gulnara and Talania could have been major ground battles, not space battles. And what of the Vega Engagement? That's such an odd name, isn't it? Engagement. Why not say "Battle of Vega?" Answer: It wasn't considered a battle at all, it was a fleet action, and a exceptionally rare one at that. It just resulted in a horrific loss. Perhaps it was the first destroyer vs destroyer fight the GTA and PVE ever fought!
It's a different thought at least.