Through their bravery, these soldiers became legends in their country.

legends 是名词 legend 的复数形式。legend 指"传说、传奇人物"，通常指因其非凡事迹而被广泛传颂的人物或故事。在这里指这些士兵因其英勇行为而被国民传颂，成为国家英雄。