The Ministry of Defence has faced criticism following the imprisonment of a predatory instructor for a series of sexual assaults and harassment.
Army Corporal Simon Bartram, 32, specifically sought female recruits, some as young as 16.
He perpetrated sexual assault during a training exercise and frequently intruded upon them as they exited the showers unclothed.
The married father of one told a teen: Id have a threesome with you and your mother, praised anothers nice bum and t*ts and pestered one to show him a tattoo on her bottom.
He was detained for 20 months but Emma Norton, of the Centre for Military Justice, urged the Ministry of Defence to do more to protect recruits.
She said: Time after time, we see it taking the smallest steps it thinks it can get away with at the expense of fundamental reforms.
Bartram, of the Royal Electrical and Mechanical Engineers, was accused of targeting six girls over nine months between 2020 and 2021 at a military college in the north of England.
All were left profoundly distressed, the military court at Catterick, North Yorks, heard.
One suffered from PTSD and another left the Army.
Bartram, of Hull, denied 22 charges, but was found guilty of nine and sent to the Military Corrective Training Centre in Colchester.
He was also stripped of his rank and dismissed from the Army.
An Army spokesman said: The Army has zero tolerance when it comes to sexual harassment and personnel convicted of a sexual offence will be dismissed.
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