In 1918, when Poland regained its independence women were finally given the right to vote. Dulębianka served as a delegate to the Provisional Government Committee and was elected Chair of the Women's League. When the Polish–Ukrainian War broke out in November, she joined the Polish Red Cross, organized the Polish sanitary service, and participated in the defense of Lviv. Initially she worked as a nurse, but gave up the post to serve as a messenger. She organized relief efforts for Polish soldiers interned in Ukrainian prisoner-of-war camps. Traveling on irregularly-running trains, as well as on foot and horseback, Dulębianka and two hospital workers, and Maria Opieńska, made their way through the snow to the camp at Mikulińce. In the camp, she contracted typhus and the group returned to Lviv.