The UEFA Nations League is a prestigious international football competition contested by the senior men's national teams of the member associations of UEFA. Launched in 2018, it replaced most international friendly matches with a competitive league format, headquartered in Nyon, Switzerland. The 55 nations are divided into four leagues (A, B, C, D) based on ranking, with promotion and relegation between them. Each league has groups, and the winners of League A's groups advance to the Nations League Finals to compete for the title. The competition's main characteristics are its innovation in the international calendar, providing meaningful matches for all tiers, and offering a secondary route to qualification for the UEFA European Championship. It has significant commercial value and global viewership. The ultimate honor is winning the UEFA Nations League trophy, a major international title that has been claimed by Portugal, France, and Spain.