crusade vs take the field

crusade is a noun but take the field is not a noun.

Word	Noun	Adjective	Verb	Adverb
crusade	Yes	No	Yes	No
take the field	No	No	Yes	No

As verbs, take the field is a hypernym of crusade; that is, take the field is a word with a broader meaning than crusade:

Other hypernyms of crusade include campaign.

crusade (noun)	take the field (noun)
a series of actions advancing a principle or tending toward a particular end

crusade (verb)	take the field (verb)
go on a crusade; fight a holy war	go on the playing field, of a football team
exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for	go on a campaign; go off to war