noun, noun or participle which takes 'suru', intransitive verb
grand coalition; united front; merger of diverse groups
Refers to a large-scale alliance or merger of various factions, often in political or organizational contexts, setting aside minor differences for a common goal.
野党が大同団結して与党に対抗した。
The opposition parties formed a grand coalition to oppose the ruling party.
Calls for a united front are growing louder.