Why did Chiarelli's men approach him when it was time to erect a memorial for the men who died the first year of Chairelli's first deployment?

After 169 soldiers died in one year during Chiarelli's first deployment, it was time to erect a moment. Before the monument was built, Chiarelli's junior officers told him that they wanted only 168 names on the memorial. One of the men had committed suicide, and they did not want his name included.