[ETCM]

then 20 traumatic brain injuries had to be evacuated to Germany (doesn’t sound minor to me)

TBI = concussion. Usually minor, but an MRI is a good idea just in case. You don't get 20 serious TBIs without many other types of trauma/casualties, including deaths.

[JustaTech]

You don't get 20 serious TBIs without many other types of trauma/casualties, including deaths.

They could of all been in one location which was within X distance of X yield explosion, which calculates out to X overpressure. Since TBI has become a major issue I presume the military has specific criteria for exposure and requirements for medical evaluation.

IOW, routine.