Marshall was a member of the United States under-20 women's national soccer team that competed in the 2008 FIFA U- 20 Women's World Cup in Chile, starting in and playing every minute of all six matches of the tournament.
Marshall was a member of the United States under-20 women's national soccer team that competed in the 2008 FIFA U- 20 Women's World Cup in Chile. Along with fellow central defender Lauren Fowlkes, Marshall started in and played every minute of all six matches of the tournament.