Who lives in this bases now? If they are empty and the area is too contaminated, to start this people should be moved. Show some action.
This particular set of symptoms can be found in people poisoned, but also consistently in any committed heroin addict all around the planet. Every single one of them.
This fact should be taken seriously to anybody trying to investigate this problem. There is a deafening background noise in the poor health variable just because the average level of health in the whole population was abysmal before, and this noise must be sorted out.
But is there something unique about munitions used in Afghanistan or Ukraine vs those used in WW1/2 or Vietnam or Korean wars that are particularly more toxic or have increased duration of toxicity that would make crops unusable? I would have suspected the munitions to be similar enough to see the same effects.
And while the GP said toxic, I have to imagine leftover bomblets from cluster munitions are going to have serious effects on working the land as well.