noun, noun or participle which takes 'suru'
closing ranks; uniting and working together; coming together for fighting
Describes a group uniting firmly, often in the face of a challenge or for a common purpose. Can be used as a noun or with する to mean 'to unite and act as one'.
チームが一致結束して優勝を目指した。
The team closed ranks and aimed for the championship.
困難な状況
It is precisely in difficult situations that uniting and working together is required.