Tacoma Defiance, formerly Seattle Sounders FC 2, is an American professional soccer team based in Tacoma, Washington, U.S. that competes in the USL Championship, the second tier of the national soccer pyramid, as the reserve team of Seattle Sounders FC. The Defiance is operated and managed by Seattle Sounders FC, while 20 percent of the club is fan-owned through the non-profit Sounders Community Trust.
The club was established in 2014 as Seattle Sounders FC 2 (S2) and originally played at Starfire Sports in Tukwila, Washington. The team moved to Tacoma's Cheney Stadium in 2018 and was rebranded as the Defiance the following season. The Defiance plans to move into a new soccer-specific stadium near Cheney Stadium in the 2020s.