The officers in command of the battalion of Pvt. Danny Chen, who the Army says committed suicide in Afghanistan in October after being hazed by fellow soldiers, were aware of the harsh treatment he had repeatedly received, his family said Thursday.

The family had already been told by investigators that other soldiers had taunted Private Chen with racial epithets and forced him to crawl on the ground while they pelted him with rocks. But this week, new details of his treatment were disclosed to the family.

At a news conference, family members and their supporters said Private Chen had been mistreated virtually every day of his six-week stint in Afghanistan. They said he had been called a “gook,” a “chink” and “dragon lady.” He was also forced to wear a green helmet and shout orders in Chinese, to a battalion that had no other Chinese-American soldiers, they said.

Previously, the family “had no idea of the extent or how long this mistreatment had been going on,” said Elizabeth R. OuYang, president of the New York chapter of OCA, a civil rights group. Ms. OuYang, who is a lawyer, declined to comment further about ranking officers’ knowledge of the harassment of Private Chen.