Kennedy-Fraser had formally applied during World War One, to travel to The Hague in April 1915, as one of 180 women activists and pacifists, including Christabel Pankhurst, to represent their country as part of the Women's International Congress, demanding peaceful resolution to disputes and women's formal engagement in international affairs. Her permission to travel, as with most of the group, was denied for military reasons, and only 3 British delegates were among the Women at the Hague.