cavalry

This term carries a strong association with speed, shock, and decisive intervention. In a historical sense, it evokes the image of galloping horses and the thunderous sound of a charge intended to break enemy lines through sheer momentum. In modern colloquial usage, it often functions as a symbol of rescue or late-stage reinforcement. When someone says the cavalry has arrived, they are usually referring to a sudden arrival of help that saves a desperate situation, regardless of whether actual soldiers are involved.