Masefield spent the next half of the war travelling between England and France, and was in fact sent on an assignment to observe and write about the American medical relief forces on the continent, in an effort to emotionally sway American support for the war effort. Although privately, Masefield felt that the American presence in France was pitiful for the most part, he did write an article which was published in the May 1917 issue of Harper�s Monthly, providing a heroic account of work with the American ambulance services.

Because of the success of his wartime writings, Masefield received a request to meet with the head of British Military Intelligence in France and was requested to write a full account of the Battle of the Somme. By this time, Masefield was very much missing Constance, and sought her advice. Constance�s response to him was indicative of the continuing care and love the couple had for each other, and although Constance did wish for time to be spent with John, she believed in his capabilities, and advised him that he should accept the request in order to help the Allies win the war.