Collectible coins are often categorized into various types, including circulating coins, commemorative coins, and bullion coins. Medals, while similar in appearance to coins, are not legal tender and are typically issued to commemorate events, people, or achievements. The United States Mint produces both coins and medals, with U.S. Mint medals often celebrating significant historical milestones or cultural themes. In 2018, several notable medals were struck, reflecting diverse aspects of American heritage and accomplishments.