[X] Plan Slowly at First, and Then All at Once
If Rachi have reserve, is there a chance that they'll attack us again when we move the second fleet away?
Yes, but if we leave the 2nd Battle Fleet parked on the relay for fear of a
purely hypothetical rachni attack, then we've ordered 40% of our mobile battle forces out of combat, while the other 60% are embroiled in desperate fights against enemy battlegroups that outnumber them 2:1.
At which point the rachni have pretty firmly won the "divide and conquer" competition. Their battlegroups from the Nubian Expanse and Hades Gamma can Lanchester our relatively small blocking fleets to pieces and hope to stay reasonably intact, then come together to crush our 2nd Battle Fleet like a grape after their reserves arrive from the Maroon Sea to pin it in place.
Committing the reserves at this point is a mistake. They're not concentrated enough to make a difference and we need to hold them back in case one of the fronts are at risk of completely falling.
At their present size,
and for the foreseeable future, they're too small to actually help if one of the fronts is falling. If the 3rd Raiding Fleet can't hold the rachni battlefleet coming at us from the Nubian Expanse, bailing them out is going to take a force
at least comparable in size to a whole raiding fleet. Our reserves aren't that large and won't be for some time.
We do not, for practical purposes,
have a reserve force right now, because if we actually tried to commit the reserve in a situation dire enough to require its attention, said reserve force would evaporate like a butterfly under a blowtorch.
We need to
make a reserve force, which we must do by wresting the 2nd Battle Fleet out of combat (or rather, winning that combat as soon as possible), so that it can be used to shore up the other parts of our defensive front line which are going to start collapsing any time now.
Guys we're forgetting something. The Quarians fleet we rescued went home. The Rachni don't know they went home. They must still think that that fleet is currently gathering for a counterattack from the SO relay. Or acting as a reserve fleet in case the cluster falls with the objective of saving as many Virmire warships as possible during the retreat through the SO relay.
Now
that is a very good point.
Although the rachni may have no idea where the quarians are. In their pre-attack planning they may have thought "maybe the Virmireans are using the quarian fleet to suppress our holdouts on the other systems in Attican Beta," in which case those quarian ships would need considerable time to get back to the Hercules system to rejoin the battle.
On the other hand, if rachni queens have real-time communications with other rachni in the same star cluster, the first thing Admiral Queenie did, in all probability, was to send out messages to the surviving holdouts going "hey, did any of you get the license plate numbers of those ships bombing you from orbit," which may have given them some clues.
...
That said, you're right that they know we have more ships than they now see, and that they cannot predict where those ships are or what they are doing.
Let me repeat this:
A Virmirean raiding fleet has half the combat power of a Virmirean battle fleet.
Our current reserves amount to roughly a quarter of a raiding fleet, which amounts to an eight of a battle fleet.
The 2nd Battle Fleet is still at 99%, and the fortifications are a little above half their original strength.
The Rachni are at 65% and falling fast.
Throwing 12% of a battle fleet in reserves there will not add decisive force to the 2nd Battle Fleet combat.
No, it will not, but it will amplify the 2nd Battle Fleet's numerical advantage.
I'm pretty sure that the core assumptions of the Lanchester Law applies to our fleet combats: a force's ability to inflict damage on the enemy is roughly proportionate to its own strength. A reinforced fleet at 111% strength will do about 12% more damage than a fleet at 99% strength could deal. It will kill enemy ships faster,
and consequently take fewer losses as that particular combat proceeds to completion.
(
@PoptartProdigy , I know you normally don't like to talk about game mechanics, but if the above statement is false, we
really need to know, because it affects how we model what's going on with our fleets and what the numbers you're giving us about their combat strength even mean)
Moreover, uniting Mira's command group and the scratch force of ships she's gathered from the incoming stragglers, and the 2nd Battle Fleet, will place Mira personally in the same location as the largest available reserve force- if she needs to assume personal command for some reason that's a good thing, and it makes her more secure from something like one of the rachni battlefleets deciding to get cute and peel off half their screening elements to kill the enemy commander, namely
us.
What it will do is burn their fuel and raise their heat. And leave us no fresh forces when the Rachni reserves trundle in.
Unless the rachni reserve
itself is something like 25% of a battle fleet or less (unlikely), our existing reserves won't be effective when that happens anyway. I'd rather have them a bit tired out, but combined with another force large enough to accomplish something relevant on the scale of the engagement, rather than being fresh, but isolated and weak enough to be treated as a target of opportunity.
Might even embolden the Rachni to commit their reserve early in the belief that they've seen all our forces.
And frankly, if they throw in an additional battle fleet now at any relay, with two of our raiding fleets still coming in, we're losing the relay. Possibly the cluster. It's the belief that we have unseen reserves that's staying their hand.
If they think the existing "12% of a battle fleet" force Mira's moving around here is the only reserve we have, then they'd already be committing their reserve because 12% of a battle fleet isn't a tactically meaningful force in isolation on this scale.
The reserve they "know" we have is the quarians (roughly 50% of a battle fleet) plus various raiding formations.
That is a force significant enough that it's worth holding back a battle fleet worth of reserves to counter it when it arrives on the field. The force Mira has in hand... is not.
I expect that the rachni will look at the eighth-of-a-fleet we're sending to reinforce the 2nd Battle Fleet and go "aha, that is just a column of stragglers joining up, or a small formation doled out from their reserves for some reason, not the whole reserve force." For that matter they're basically right, just not for the reason they'd expect.
We have roughly two and a half raiding fleet's worth of combat power coming in from Virmire.
There are reserves. You just need to let them concentrate.
OK, well about how long is that going to take?
@PoptartProdigy may be able to provide us with an estimate.
Roughly how many turns of combat will it take for us to accumulate roughly a raiding fleet's worth of reserves?
My gut feeling is that it will take several turns for this to happen, in which case the battle may already be lost before we have enough reserves to do anything ambitious like saving the 3rd Raiding Fleet...
Unless we free up the 2nd Battle Fleet, in which case we might as well do everything in our power to enhance its striking power to preserve our own forces.
EDIT:
Oh hey, I was looking at the previous post:
Poptart said:
The 1st and 2nd Raiding Fleets and the Explorer Corps are trickling in piecemeal from their patrols, and won't be fully gathered for another six days. How do you want them to deploy?
-[ ] Immediately, to whatever relay most needs the reinforcements.
-[ ] To gather as a reserve force within the Hercules system.
-[ ] Write-in.
Our reserve force consists of two raiding fleets and the Explorer Corps, with a combined strength of 1.25 battle fleets. However, it will take
six days for those forces to fully assemble, and unless we pull off a miracle we're losing this cluster within one day, maybe within two.
Right now we have a reserve of 0.14* battle fleets.
And it's likely to increase by, oh, no more than 0.2 or 0.25 battle fleets per DAY that we wait, unless we have a very large slug of reinforcements inbound from, say, specifically the ships that were undergoing minor refits at the yards in Virmire.
This reserve force is simply not large enough to matter
as an independent force, so it should not be held back the way a normal reserve force would be held back. The best use for it is to reinforce success to maximize the likelihood that we get a virtuous-cycle "snowball effect" of a large Virmirean force blowing away a small one with minimal casualties.
We're already outnumbered; we can't afford to hold back ships for a whole day.
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*(12% of the Explorer Corps is 3% of a battle fleet, while 14 and 8% of the First and Second raiding fleets constitute another 7% and 4% of a battle fleet, respectively.)