u.s. women s team had fought against the u.s. soccer federation, demanding equal pay. every time a woman is not paid equally, suddenly everyone is not and no one s potential is able to be reached. reporter: it took a lawsuit settlement to get the federation to pay the women fairly. there have been so many lockouts, so many times skipping camp, so many moments of labor solidarity. things really revved up after the women won the 2015 world cup. every step of the way, it s been a fight. reporter: and every step of the way, there s been a different kind of disparity on the field. in all of u.s. soccer history, the women s team has won four world cups. the men have won exactly none. women parity soccer in the united states, i love the men s team, but it s the women who have put this sport on the map. who are the pride of the nation. reporter: but while u.s. soccer has made progress on fair pay, world soccer remains far behind. this year the total prize money