他在战斗中阵亡了。

He was killed in ___action.

经过数月的训练，士兵们终于在前线经历了战斗。

After months of training, the soldiers finally saw ___action on the front line.

这位老兵因在那次战斗中被敌军炮火袭击时表现出的英勇而获得了一枚奖章。

The veteran received a medal for his bravery under enemy fire during the ___action.