"calls" would be the right tense to use in this question
So people can clearly understand the emotion and hear concern or sympathy. If it were through email or text messaging, people would not feel/hear any emotion.
Trudged means to walk slowly and could be with loud or quiet steps but in this case it is silent steps. the context clues would be that they marched which means walks and along silently behind them, so basically they were waking silently behind them.
Jus use this website called google and look up everything and copy and paste I promis u most teacher don’t notice