 At The Hague 28 April to 1 May 1915 , a large congress of 1 @,@ 150 women from North America and Europe gathered to discuss peace proposals . The event was called the International Congress of Women , or the Women 's Peace Congress . The 180 @-@ strong contingent of British women was greatly reduced by Winston Churchill 's purposeful cancellation of British ferry service across the Channel , stranding most of the British activists . Already in Antwerp , Macmillan easily attended the women 's conference to speak for the UK — she was one of only three British women present . Macmillan was selected as a member of the international committee who were to travel to neutral nations and champion the proposal of the Congress . The Wisconsin Plan was unanimously adopted as the optimum method for returning peace to the world , and Macmillan , Schwimmer and the committee travelled to the neutral US to present President Woodrow Wilson with it . Many of the women 's peace proposals were used by Wilson in his Fourteen Points , and the women 's efforts helped encourage the later founding of the League of Nations . 
