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Before joining the U.S. Women's National Team (USWNT), Swanson played extensively with the U.S. U-17 and U-20 teams. With the U-17 team, she appeared in the 2012 FIFA U-17 Women's World Cup and helped the team to a third-place finish. With the U-20 team, she appeared in the 2014 FIFA U-20 Women's World Cup and helped the team to a fourth-place finish.