Perhaps some military ATCO's on here could help, but I think the military have different rules about identification. Flying around Scotland last year I was frequently identified on the basis of a 7000 ident. So it MAY be the case that a FIS conspicuity squawk issued and then idented could be good for an ident? I don't know that but I think it slightly pressumptious to apply civil regs to military units who may not be singing from the same hymn sheet.