All this time, the Mezentine detachment who'd started the sortie by attacking the allied forward shift were wondering what had become of the ambush party, who were supposed to come down the trench and join them after they'd finished dealing with the relief shift. The original detachment were in comparatively good spirits, once they'd got over the horrors of victory. They interpreted the ambush party's failure to arrive as evidence that they were in trouble and needed help; so they set off down the trench to find them.
Needless to say, they ran into the allies, taking them by surprise, in rear, while they were still effectively stunned by the disaster of the collapsing bank. As a result, the Mezentines caught them entirely unaware and began the engagement by killing half a dozen of them. This was, of course, the worst thing that could have happened for the Mezentines; it encouraged them to press home their advantage, so that when the allies realised they were being attacked again, by yet another separate enemy unit, they pulled themselves together and fought back with full professional savagery. It was only the speed with which the narrow trench clogged up with bodies that saved the third of the Mezentine detachment that made it out over the bank and escaped. The remaining two thirds never had the satisfaction of knowing they'd blocked the trench as effectively as the landslip.
Just over three fifths of the sortie made it back to the City embankment; rather fewer than planned, rather more than Psellus himself had dared to hope. For the allies, the aftermath was almost as chaotic as the action itself. The Mezentines, according to the report the Eremian lieutenant made to General Daurenja that evening, were unorthodox but nonetheless fearsome opponents. Their offensive and weapons skills were negligible, but their sheer grim determination, the way they kept on attacking, wave after wave of them, made them worthy of cautious respect. On the other edge of the camp, meanwhile, the advance-shift sappers who'd managed to get away were having their horrific wounds treated by the Vadani surgeons, and were telling anybody who'd listen that the Mezentines were vicious, sadistic savages who fought to inflict pain rather than kill, and if the general thought they were going back down in the trench again without proper infantry support, he was very much mistaken.
General Daurenja spent the night reflecting on what he'd been told, and called a full staff meeting at dawn. The situation, he told them, was not good. The approach trench for the heavy machinery was so badly damaged as to be useless; it'd be quicker and easier to start again. The main trench was blocked in three places. Casualties had been unexpectedly heavy-due mostly, admittedly, to the cave-in of the trench wall, but even so, it was clear that Duke Valens had underestimated the enemy's fighting spirit, if not their military competence. Sorties, contrary to what the duke had told them, were likely to pose a real danger to siege operations. Furthermore, the sappers were now deeply worried at the prospect of further attacks-understandably so, considering the horrific nature of the wounds their colleagues had suffered-and were refusing to go back to work until satisfactory arrangements for their defence had been made. Strictly speaking, this was mutiny; however, the sappers were civilian labourers rather than soldiers, and they had a genuine grievance, which no responsible general could afford to ignore. Accordingly, he had decided to advance the artillery to the point where it could lay down suppressing fire on the enemy embankment, and to station archers, sheltered by pavises, at the points of the zigzags, which would also be fortified with redoubts built of gabions and sandbags. Finally, each redoubt would be garrisoned with a platoon of heavy infantry to provide a rapid response in the event of future sorties. It was true, he conceded, that advancing the artillery would bring them in range of the enemy, quite possibly leading to an artillery duel, which Duke Valens had been anxious to avoid. But that, the general said, seemed to him to be ducking the issue. Victory would only be possible if the allies could establish clear artillery superiority. If that meant a protracted artillery duel, the loss of siege engines and trained crews, it was a price that had to be paid. As he saw it, they really had no choice in the matter. "It was a mistake," someone was saying, and Psellus fought to restrain a smile. In the old days, when Boioannes sat in this chair, nobody would have dared to talk like that. Progress, he thought; I've given them freedom of speech to criticise me with. If we survive this, that really ought to be worth a statue, or my head on the two-dollar coin. But I don't suppose anybody except me has even noticed.
"You could well be right," he replied gently. "Some brave men lost their lives." And some cowards too, he added to himself; and I feel guiltier about them, because I conscripted them to fight. There's an argument for saying that brave men deserve what they get, but it's a serious business forcing cowards to stand in harm's way. "But you may recall, I said that the primary objective would be damaging the new trench, the one I feel sure is being built to shift heavy equipment. And on balance, we succeeded."
Someone else shook his head, rather dramatically. "Really, that's beside the point," he said. "That may be what you set out to do, and yes, you managed it. Congratulations. But the rather more important outcome is that they're moving their artillery up and fortifying the trench bends. Which means they're going to start bombarding the embankment very soon."
"True," Psellus said. "It's also true that if they can reach us, we can reach them. And they're in the open, and we're under cover."
"It's still an unlooked-for escalation," said the troublemaker (he chided himself for the instinctive characterisation; give them free speech, then brand them as troublemakers when they make use of it. Lucao Psellus, for shame!). "Furthermore, by prompting them to improve their defences, you've made launching further sorties much more difficult and dangerous."
This time, Psellus allowed his smile to show. "Actually, I wasn't planning any further sorties," he said. "We aren't very good at them, after all. The purpose of this one was to cause delay, because they only have a limited time in which to sack the City before their food runs out. Actually," he went on, "if you'll excuse the digression, I've been thinking about that, and doing a few simple sums, and I've reached the conclusion-I'll go through the figures afterwards with anyone who wants to see them-that they're rapidly approaching a point of no return in that regard, the point where they either have to capture the City and our food reserves, or else give up and go away before they starve. If they pass that point, whenever it comes, and fail to take the City within the critical time period, they will run out of food. Even if they win, if they leave it too long, there won't be enough food left in our stores to feed their army. Therefore, when that point in time comes, they'll have to make a decision-do we have a realistic chance of victory within the time limits imposed on us by the supply problem?-and if the answer is no, logically they should abandon the siege and go away." He paused, disengaging his mind from the train of thought these issues had set in motion. "As it happens," he went on, "and I can't claim credit for it, but it's extremely useful nonetheless, the sortie was far more successful in this regard than I expected. Now that they're guarding and fortifying the trench, their rate of progress will slow down significantly. If we can win the artillery battle-it doesn't matter if we lose half our trebuchets and mangonels in the process, we can easily build more-to the extent where we can silence their batteries and use our artillery to slow up their progress even further, we'll have done well for ourselves, very well indeed. We also have an advantage in the recent change of command, I believe. I know nothing about this General Daurenja, or at least nothing I'm prepared to believe without further and better evidence, but it seems to me that he is much more a soldier than the duke was. He thinks in strategies and tactics; models in sand-trays, if you like, or pieces on a chequerboard. He resents the losses we somehow managed to inflict on him, and has taken steps to stop us doing it again, because he's a good soldier. Duke Valens' instincts, on the other hand, would always be to make sure his people had enough to eat, regardless of the strictly military priorities. I think General Daurenja will be more likely to neglect the food deadline until it's almost on top of him, which will lead him to panic and overestimate the danger out of guilt. Or he may turn a blind eye to the problem and ignore it, in which case his allies the savages will depose him, and quite possibly end the alliance." He stopped talking and looked at their faces. They were watching him; listening, rather than planning out their next interruption. Remarkable. "I'm a firm believer in the merits of letting our opponents do themselves as much harm as possible, and in the situation we face, I feel sure that our enemies are our best allies."