Pedzisa mutsara unotevera: Somumwe wevarume vokuAmerica vakamhanyira kumhanya mamita 4×200, akahwina menduru yebronze muna 1908 uye yesirivha muna 1912; muna 1912 akahwinawo mumakwikwi emamita 100 ekumhanya kumusana. Mumakwikwi emamita 100 akasununguka, akabviswa mumasemi-fainari muna 1908, uye mumakwikwi e
kokutanga muna 1912. Muna 1920 akanga ari nhengo yechikwata chechina cheAmerica chemvura yepolo.