#four hundred men

"400 men" (See: [[:en:ta:vol2:translate:translate_numbers]])

#afraid

This refers to the unpleasant feeling a person has when there is a threat of harm to himself or others.

#upset

"distressed" or "troubled"

#to one camp and attacks it, then the camp that is left will escape

Here "camp" refers to the people. AT: "to attack the people in one camp, then the people in the other camp will escape" (See: [[:en:ta:vol2:translate:figs_metonymy]])