The story behind the coin
The American Legion did not start in a marble building in Washington. It started in Paris, in March 1919, among soldiers who had just won a war and weren't sure what came next.
The American Expeditionary Forces — the U.S. troops who fought in World War I — were stuck in France waiting to go home. Morale was thin. So a group of officers, with Lieutenant Colonel Theodore Roosevelt Jr. among them, proposed a veterans' organization. About a thousand officers and enlisted men gathered for what became known as the Paris Caucus on March 15–17, 1919. They adopted a name — The American Legion — and a temporary constitution. By that September, Congress had granted them a national charter.
What grew from that meeting became one of the largest veterans' groups in the country. For its 100th anniversary, Congress decided it deserved a coin. The American Legion 100th Anniversary Commemorative Coin Act became law on October 6, 2017 (Public Law 115-65), authorizing a three-coin program — a $5 gold piece, a silver dollar, and this clad half dollar — all dated 2019.
Here's the part collectors love: this is a commemorative, not a circulating coin. It was never meant for your pocket. The Mint made it to be bought, kept, and to raise money — and then it stopped. By law, the coins could be issued for one year only. When 2019 ended, the dies went quiet for good.