The use of LLMs to make automatic or semi-automatic decisions on firing weapons. This is already happening [1, 2, 3] and has already led to weapons being delpoyed erroneously against civilian targets [1, 3]. It's easy to imagine it happening again on a larger scale, maybe involving nuclear weapons at some point in the future.

[1] https://gizmodo.com/pentagon-investigators-say-overreliance-...

[2] https://www.the-independent.com/news/world/americas/us-polit...

[3] https://www.nytimes.com/2026/08/24/world/europe/russia-drone...