The term "St. Andrew's Cross" refers to a diagonal cross that is associated with St. Andrew, the patron saint of Scotland. This cross is formed by two diagonal lines crossing each other, resembling the letter "X." It is prominently featured on the Flag of Scotland, also known as the Saltire, which symbolizes the country's heritage and history. In addition to its national significance, the St. Andrew's Cross is used in various contexts, including heraldry and military insignia. It represents bravery and sacrifice, often appearing in the emblems of organizations and institutions that honor St. Andrew or Scottish culture.