Short answer: A Call to Arms is set in 2266 .
Spoiler-safe context: A strategic turning point that sets up the mission and stakes of Crusade .
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Historical Record
By 2266, warnings of a looming threat coalesce into open aggression. Babylon 5 helps convene a rapid defense alignment, tasking mixed crews and prototype systems to intercept a strike aimed at Earth. Decisions move at jump speed: fleet elements scramble through hyperspace, intelligence analysis routes straight to the war room, and diplomatic channels stay just open enough to avoid wider entanglement. The operation tests new tactics alongside hard‑won lessons from recent wars.
Though brief, the campaign’s consequences are long‑term. Worlds that once hesitated to share capabilities now coordinate patrols and logistics. Earth Alliance agencies and independent forces establish liaison practices that will shape joint missions for years. Historians mark this call to arms as the moment postwar caution gives way to pragmatic solidarity—and as the spark for a sustained effort to undo the damage the attackers attempt to unleash.
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FAQ
Q: When does Babylon 5: A Call to Arms take place?
A: In 2266 , setting up Crusade .