A snowball fight; throwing snowballs at each other as a game, commonly played by children or at events.
公園で子供たちが雪合戦をして大はしゃぎしていた。
Children were having a great time having a snowball fight in the park.
冬祭りでは地域対抗の雪合戦大会が開催される。
At the winter festival, a regional snowball fight competition is held.
大人も参加して、昔話をしながら雪合戦を楽しんだ。
Adults joined in and enjoyed the snowball fight while reminiscing about old times.