Read Termination Shock by Neal Stephenson? Features truck based drone swarms, if this was not in the threat model already our guys need to read more speculative fiction.
Have to say, while 100% support Ukraine and delighted when they succeed, there's something unsettling about living in the era of the Flying Killer Robots
A friend of mine who works in tech says he's heard that the UFO panic in the US a few months back was (partially) caused by Chinese drones that launched from shipping containers at night, buzzed by US military installations and then returned to "base" before dawn.
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Phalanx CIWS being posted around the perimeters seem far more likely.
A lot more murdery, too
I think it might be harder to target in middle of indian ocean.