# Microsoft Backs Anthropic in Legal Fight Against Pentagon Blacklisting

- slug: microsoft-backs-anthropic-in-legal-fight-against-pentagon-blacklisting
- date: 2026-03-14
- category: Artificial Intelligence

Microsoft has thrown its weight behind Anthropic's legal challenge against the Pentagon, filing an amicus brief that argues the AI company's designation as a 'supply-chain risk' should be temporarily blocked.

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