USDM1 is a USD-denominated, sovereign bond issued onchain by the Republic of the Marshall Islands, a sovereign nation operating on the U.S. dollar standard. Each unit is issued at par and fully collateralized 1:1 by short-dated U.S. Treasuries held on a segregated basis with a U.S. trust company. USDM1 represents a direct sovereign obligation, issued under New York law with explicit waivers of sovereign immunity, providing legal enforceability consistent with traditional sovereign debt instruments. While it functions operationally similar to a stablecoin, supporting on-chain transfer, transparency, and settlement efficiency, USDM1 is not a private corporate stablecoin, CBDC, wrapped asset, or synthetic dollar representation.