We can see in Ukraine that AI plays a very very small role in the war. Production of small drones and their control across jammed areas is the current problem space.
And I bet that a majority of those LLM usage in Ukraine is via local focused models, good for picking shapes on a grainy images and not much else, but fast and cheap. There is literally zero use for the gigantic general LLMs which can produce human-like output and routinely generate fake numbers, in the army setting.