Google has unexpectedly withdrawn from a $100 million Pentagon challenge to develop technology for voice-controlled autonomous drone swarms. The decision, made on February 11, came after Google advanced in the competition, which aims to enable commanders to control drone swarms using voice commands. The company cited a lack of resources as the reason for its withdrawal, following an internal ethics review. This move has disappointed several employees involved in the project, highlighting ongoing tensions within Google regarding the use of its technology for military purposes. Hundreds of AI researchers at Google have voiced objections to the company's involvement in classified military work, reflecting a broader concern in Silicon Valley about the implications of developing autonomous weapons systems. The Pentagon's initiative, led by its Special Operations Command and the Defense Innovation Unit, has also attracted other tech companies, including OpenAI and Palantir. Despite its withdrawal, Google has recently amended its existing contract with the Pentagon to provide AI models for lawful government purposes, while maintaining a commitment to avoid applications in autonomous weaponry without human oversight.