I wouldn't believe anything the military tells you about justice.

The US military told people whatever they needed to tell them to follow orders. That's why they follow unlawful orders like those to extrajudicially blow up non-combatant US citizens abroad, and imprison people in Guantanamo for decades without trial, assist the disarming of innocent US citizens in NOLA in the aftermath of Katrina, blackball soldiers in Vietnam that reported war crimes, and all manner of other things that hardly anyone seems to be held to account for.