Three Batteries

Battery Three sat inside a hill on the eastern edge of the second city. It had a single bright door and a long, cool corridor that always smelled faintly of dust and lubricant. Juno Venn had walked it four hundred times and never once at a run.

She ran it now.

The fire-control room was half full when she arrived, and the other half arrived behind her, shrugging into headsets. The wall display showed the sky the way the batteries saw it: not stars or stations, but tracks. Hundreds of them, more than they had ever trained for, falling from the damaged ring toward the four cities.

The defenses appeared as three separate layers. The orbital stations were the first, and many were already going dark. Below them the city’s shield domes showed as four overlapping arcs. Between the two were the interception corridors assigned to the three ground batteries. Battery One guarded the western approach. Battery Two covered the central lanes. Battery Three watched the east and the gaps neither of the others could reach in time. None of the batteries could be everywhere.

“Siege shells,” said the battery chief, a heavy, calm woman named Okafor whom everyone called Chief and no one called anything else. “Drones behind them. Something dropping mines on the approach lanes. Bombers above that, I think. Pick the shells first. Shields will hold the small ones for a while. A while is not forever.”

Juno took her station. The console woke under her hands.

The battery’s training simulators had made this look simple. You chose a point in the sky ahead of a falling track, and an interceptor met it there and became a flower of light, and if you chose well the flower caught several threats at once. In the simulators, the cities were outlines. Tonight they had windows.

She fired.

The battery shook as the interceptors left their tubes. Through the slit of armored glass above the consoles Juno watched the trails climb into the honeycomb sky and burst. Some shells broke apart. Some did not. A heavy one struck the shield above the first city, and the hexagons around it flared white and spread the force outward in a ring that rolled across the dome like a wave across a pond. The shield held. The next one would have to hit the same place.

“Reload on Two,” Okafor said. “Battery One reports a mine field over the river approach. Don’t waste a shot there unless something flies through it.”

Time stopped behaving. Juno would remember the night later as a list of moments with nothing between them. The shield over the third city dimmed and recovered. A drone swarm flew straight through a burst she had placed perfectly, because there were simply more drones than light. A message from Battery One said they were taking direct fire, then nothing came from Battery One for six minutes, then a new voice said they were still firing. Somewhere above them all, the Lantern squadron fought in a sky she could not see.

On the tactical map, the falling objects had different origins. Some were the strangers’ shells. Some were missiles no longer under guidance. Others were fragments of Terran stations that had been built to protect the cities below. Battery Three fired at all of them. The difference mattered to historians, perhaps. It did not matter to a shield about to fail.

Once, between reloads, she let herself look at the city. The trams had stopped. The museum terrace was too far to see. She did not know which shelter her grandmother had chosen, and there was no channel on which she could ask.

Near dawn the great breaching ship came apart over the eastern ocean. They felt it before they understood it: a long, low pressure through the hill and a glow on the horizon brighter than the sunrise that followed it. In the fire-control room no one cheered. Okafor took off her headset, put it back on and said, “Keep firing at what is still falling.”

What was still falling grew less. Then it stopped.

By morning the strangers’ formation had withdrawn beyond the ring. Some of their ships were gone. So were stations, hangars and pilots, a district of the second city where a shell had found a seam between shield cells, and a hospital wing whose lights had been on all night for people who would not need them now. The orbital ring that had looked like something alive the evening before was a broken necklace of fires.

None of the surviving officers called it peace. The defense network had lost great portions of its outer sensors, and the remaining contacts were still beyond the boundary of the ring. The battered formation had retreated out of weapons range, not out of the system.

At Battery Three, Juno sat in the corridor outside the fire-control room with her back against the cool wall and watched the colony’s public broadcast on her wrist.

The announcer looked as though she had not slept either. Behind her was the silhouette from the museum, and the words UNPROVOKED ATTACK.

“At fourteen minutes past twenty-one hundred,” the announcer said, “the hostile fleet opened fire on Terran Reach’s orbital defense ring without warning. Our defenses responded immediately. We will release a full timeline as soon as it is verified.”

Juno watched it twice. The bulletin carried no signed engagement record, only the civil authority’s emergency summary and a set of reconstructed tracks. She could not know whether anyone preparing it had seen what Commander Renn had seen.

Then she called her grandmother. The call connected on the fourth try.

Mara’s voice was rough with smoke and age and something else. “I’m in the museum shelter,” she said. “Thirty of us, and the curators, and a lot of very old arks.”

“Are you hurt?”

“No.” A pause. “You?”

“I’m all right. Battery Three is still here.”

“Then you’ve done what you could.”

Juno remembered the bench, the two cups of tea, her grandmother’s fingers resting on her hand. The people under those shields are more than dots on your screen.

“Some of the dots went dark,” she said.

“I know.”

“They’re saying the strangers attacked us without warning.”

“That’s what they’re saying.”

“Is that what happened?” Mara asked.

Juno opened her mouth to answer and found she did not know. She had only seen the tracks. At Battery Three nobody saw anything but the tracks.

“I don’t know,” she said. “We were in the hill.”

“Then don’t let anyone make you say you know.”

Neither spoke for a moment. Beyond the corridor, a tired operator called for a fresh targeting report. The war room was already preparing for another alarm.

“I kept your tea,” Mara said at last. “It went cold.”

Juno looked at the dirt beneath her fingernails. “I’ll come finish it.”

“Come home when you can.”

In orbit, in a control center lit only by emergency strips and the steady glow of the main display, Commander Ilya Renn read the same broadcast with the network’s engagement log open beside it. The log was very precise. Its first entry was timestamped to the second, at thirteen minutes and fifty-one seconds past twenty-one hundred: ENGAGEMENT AUTHORIZED: DEFENSE NETWORK.

Below it, in the oversight queue, two identical requests waited for review.

Renn looked at them for a long time. Then she closed the queue, opened a new record and began, carefully, to write down everything she had seen.

Far beyond the broken defense ring, the surviving ships held their distance.

The Terran receivers were still listening. They heard nothing that could be translated, only the same unfamiliar patterns arriving at intervals, patient and precise. The signals went into an archive already crowded with messages nobody could read.

On the surface, shelters began opening. Families emerged into streets that had survived the night. Above them the weakened shields still glowed against the morning sky, and beyond the shields the ring burned.

For the first time in nearly twenty years, the strangers had come close enough to be seen.

And this time, they had not gone away.