Ka cika wannan jumla: Shugaba Woodrow Wilson ya fara adawa da wannan motsi, wanda ya yi imanin cewa ya kamata Amurka ta kasance a matsayin tsaka tsaki don yin sulhu a Turai. An kafa ƙungiyoyi da yawa a kusa da Harkar Shirye-shiryen kuma sun gudanar da fareti da shirya adawa da manufofin Wilson. Bayan da "Lusitania" ta nutse ta hanyar Jamus U-boats a ranar 7 ga Mayu, 1915, kuma Pancho Villa ya kaddamar da shi
da aka kai wa Columbus, New Mexico, halin Wilson ya canza. Majalisa ta zartar da Dokar Tsaro ta Kasa ta 1916 a watan Yunin 1916 don ba da izinin kara girman sojojin Amurka daga mutane 100,000 a 1916 zuwa 200,000 a kan aiki da kuma 400,000 a cikin Tsaron Tsaron Amurka, ta 1921. Har ila yau, ya yi amfani da babban karuwa na dogon lokaci a cikin Navy na Amurka.