noun (n)

• group of people willing to obey orders(noun.group)

  Synonym:
  force
  

  source: wordnet30
• the department responsible for hiring and training and placing employees and for setting policies for personnel management(noun.group)

  Synonym:
  personnel department, personnel office, staff office
  

  source: wordnet30
• The body of persons employed in some public service, as the army, navy, etc.; -- distinguished from matériel.(noun)

  source: webster1913