The fact they were sent into the dark is not a reason to understock. It is entirely the reverse.
I agree. That by itself is no reason to do it.
But wanting to act fast enough to keep the element of surprise is a possible reason. Waiting for the ships to be fully stocked might have taken longer than Command was willing to wait.
Of course it is a risk, but considering the expected situation, a rather small one, well worth it, if it makes sure the war is over before it really got started.
If the UEF would have fortified the node, the whole quick 1-day-war idea would have become very unlikely, so they had to act fast, which they did.
But the GTVA didn't know something like the UEF existed, when they started to build the portal.
I think the GTVA only turned their minds towards conquering Sol, once their spyprobes brought back the information of what the UEF and Ubuntu were like (or appeared to be like anyway).
How much time passed exactly between the opening of the portal and the launching of the 14th through the node?
Even before they knew anything about what was beyond the portal, the GTVA presumably had a contingency plan for what to do if they needed to go to war. They wouldn't have much information to base exact plans on, but "let's have a battlegroup ready to go in, and let's load it up with supplies" is pretty basic.
Usually I would agree with that, since it makes a lot of sense, but I'm not so sure it fits the facts.
We do know for a fact that the battlegroup almost ran out of supplies (of whatever kind... Admiral Bei didn't exactly elaborate in his communication with Command), even though they were only in the parallel universe for a short time ("several days" to quote Command, so probably something around one week or less).
I'm not trying to find the most sensible possiblities here, I'm trying to find the one that fits the known facts the best.
Barring some very unlikely and unlucky Shivan hits into full supply stores on both Anemois, I can only see three other realistic options:
- GTVA ships have far less independent operating time than we all expected.
- The logistic vessels have fewer supplies stored on board than we thought.
- The fleet wasn't fully stocked.
(or any combinations of the above)
Considering the timeframe of both the preparation and operation time of the invasion and the economic and political situation of the GTVA, I think the not fully stocked option is the most likely or rather the least unlikely one.