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A space opera adventure set in a distant future where an undercover agent has to go behind enemy lines to recover a lost ship and a possible traitor.

This story is included in the anthologies The Best Science Fiction of the Year: Volume 3 (2018), edited by Neil Clarke, and The Year's Best Science Fiction & Fantasy, 2018, edtied by Rich Horton.

Read the full story for free at Tor.com.

To win an impossible war Captain Kel Cheris must awaken an ancient weapon and a despised traitor general.

Captain Kel Cheris of the hexarchate is disgraced for using unconventional methods in a battle against heretics. Kel Command gives her the opportunity to redeem herself by retaking the Fortress of Scattered Needles, a star fortress that has recently been captured by heretics. Cheris's career isn't the only thing at stake. If the fortress falls, the hexarchate itself might be next.

Cheris's best hope is to ally with the undead tactician Shuos Jedao. The good news is that Jedao has never lost a battle, and he may be the only one who can figure out how to successfully besiege the fortress.

The bad news is that Jedao went mad in his first life and massacred two armies, one of them his own. As the siege wears on, Cheris must decide how far she can trust Jedao--because she might be his next victim.

Captain Kel Cheris is possessed by a long-dead traitor general. Together they must face the rivalries of the hexarchate and a potentially devastating invasion.

When the hexarchate's gifted young captain Kel Cheris summoned the ghost of the long-dead General Shuos Jedao to help her put down a rebellion, she didn't reckon on his breaking free of centuries of imprisonment--and possessing her.

Even worse, the enemy Hafn are invading, and Jedao takes over General Kel Khiruev's fleet, which was tasked with stopping them. Only one of Khiruev's subordinates, Lieutenant Colonel Kel Brezan, seems to be able to resist the influence of the brilliant but psychotic Jedao.

Jedao claims to be interested in defending the hexarchate, but can Khiruev or Brezan trust him? For that matter, will the hexarchate's masters wipe out the entire fleet to destroy the rogue general?

When Shuos Jedao wakes up for the first time, several things go wrong. His few memories tell him that he's a seventeen-year-old cadet -- but his body belongs to a man decades older. Hexarch Nirai Kujen orders Jedao to reconquer the fractured hexarchate on his behalf even though Jedao has no memory of ever being a soldier, let alone a general. Surely a knack for video games doesn't qualify you to take charge of an army?

Soon Jedao learns the situation is even worse. The Kel soldiers under his command may be compelled to obey him, but they hate him thanks to a massacre he can't remember committing. Kujen's friendliness can't hide the fact that he's a tyrant. And what's worse, Jedao and Kujen are being hunted by an enemy who knows more about Jedao and his crimes than he does himself.