From Halopedia, the Halo wiki
Around the time Master Chief John-117 arrived on the fragmented section of Zeta Halo, the Banished captured the rest of Barracuda Squad and tied them to a restraint generator. At some point after the Chief stormed the Tower and killed Chak 'Lok, his AI companion, The Weapon, picked up Barracuda's distress call, prompting the Spartan to aid the marines.
In Halo Infinite, Barracuda Squad is found in the "Connections" section of the campaign. Answering their distress call earns the player 30 Valor points. This valor is awarded even if all members of Barracuda Squad are killed.
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