War Within: [s1e14] The War Without, The

The USS Discovery emerges to find the Federation in ruins. Starbase 1, a critical hub, has been overtaken by the Klingon House of D’Ghor, and the 80,000 people stationed there have been killed. Admiral Cornwell and Sarek board Discovery to take command and reveal that the Klingon factions, though warring among themselves, are randomly and mercilessly attacking Starfleet bases.

In the penultimate episode of Star Trek: Discovery ’s first season, the crew returns from the Mirror Universe to a devastating reality: they have overshot their timeline by nine months, and the Klingon Empire has nearly won the war against the Federation. [S1E14] The War Without, the War Within

More information on the behind the mycelial moon-greening. The USS Discovery emerges to find the Federation in ruins

The episode ends with Discovery preparing to jump directly into the subterranean caves of Qo’noS to launch a surveillance drone and map the planet’s vulnerabilities for a final tactical strike. If you are looking for more specific details, In the penultimate episode of Star Trek: Discovery

Now struggling with the aftermath of his "reintegration" after the Voq personality was excised, Tyler faces the cold reality of his actions, including the murder of Dr. Culber.

With few options left, Starfleet turns to a desperate and controversial strategy. Rather than face the Klingons in traditional combat, they decide to strike at the Klingon homeworld, . To lead this mission, Admiral Cornwell makes the shocking decision to appoint the Mirror Universe's Emperor Philippa Georgiou as the captain of Discovery, passing her off to the crew as the "rescued" Captain Georgiou. Internal Conflicts and Reconciliation

Burnham confronts the complexity of her feelings for both Tyler and the Mirror Georgiou. In a somber meeting, she chooses to let Tyler go, telling him that his path to healing must be a solitary one.