What does "campaign" mean?

Campaign: (Mil.) A connected series of military operations forming a distinct stage in a war; the time during which an army keeps the field. Wilhelm.

Additional senses

  1. 2.Political operations preceding an election; a canvass. [Cant, U. S.]
  2. 3.(Metal.) The period during which a blast furnace is continuously in operation.
  3. 4.To serve in a campaign.

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