According to just two of several complaints laid out in the letter, written by a female recruit's mother, the recruits were burned with cigarette lighters and male instructors kicked women soldiers.
The union alleged that women at the infantry school were being humiliated for falling pregnant.
Sandu said it would investigate the general treatment of recruits at the base.
According to the letter, recruits were prohibited from seeking help during their first two weeks of training but were instructed to visit the clinic only to get birth control tablets.
According to the parent, who wished to remain anonymous, male recruits had their faces burned with cigarette lighters.
The mother said she feared for her daughter's safety.
Sandu spokesman advocate Pikkie Greeff said on last week he had received no feedback from the army about the letter.
Army spokesman Brigadier-General Xolani Mabanga said he was unaware of the letter.
Source: Sapa via I-Net Bridge
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