To take the field

(Mil.) to enter upon a campaign.

See also: Field

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The athletes must get their treatment in time to take the field with the rest of the team.
The coach must have a definite policy on how to take the field. Some coaches, especially for home games, allow their players to move out to the field as soon as they are dressed -- enabling them to get some extra swings in the batting cage or to take some ground balls from a fungo hitter.