Elsewhere I have offered the view that when questioned, the accused say that it's all so long ago and they have been subject to such trauma since, due to their service, that they can't remember accurately the things of which they are accused and so how can they offer a defence.
Furthermore, and given the disposal of weapons, they should demand the retesting of weapons used in the incidents and also demand that whoever countersigned the log in which the weapons issues were recorded is a key witness to testify.
If the security of the evidence trail is as robust as some, there isn't a cat in hell's chance that a smart barrister won't drive a coach and horses through the prosecutions case.
Old Duffer