The conflict could be formal military engagements, but also civil uprisings or riots; I'm using a broad definition of "conflict", though there must be a field of engagement. The weapons platform could be a drone, a vehicular weapons targeting and firing system, a missile that chooses targets and launches itself, a self-guided ground assault device, or any number of other things.

"Autonomous" - able to act without direct human action, and do so in a combat context. Can have oversight and be interruptible by human operators, but not require it. Must also be physically detached from human soldiers (no infantry firearms or supplemental gear that is unable to act when not attached to infantry helmets, packs, armor, etc.), though can be embedded into vehicles.

"Lethal" - equipped with lethal armaments intended for use on human targets, not simply a support or nonlethal pacification robot.

"Deployed" - present on the field of engagement in a nonreserve capacity.

Static explosive devices like mines and claymores don't count.

Doesn't need to actually fire or use its lethal tools against human targets, though they must be equipped while deployed.

Resolves YES if the criteria are met at any point after question creation and reported via verifiable media. Resolves NO shortly after close otherwise.