This study investigates the relationship between women, Catholicism, and medical-missionary activities during the years of the War of Resistance against Japan and the Second World War in China (1937-1945). The paper primarily focuses on how women effectively collaborated in relief activities in the international and transnational context of Manchuria, examining the involvement of both local and foreign Catholic women who undertook specific roles across diverse areas of assistance. It also explores the central role of women in the narrative of relief through their representation in media, local press, and official accounts of their religious affiliations. In particular, this work delves into the experiences of Swiss Catholic Sisters from Ingenbohl and the local virgins, the Oblate Sisters of Saint Teresa, aiming to highlight the opportunities the war provided to expand their social roles and exercise greater agency in the religious and public spheres. Drawing upon a collection of written and visual archival materials, this paper outlines how these testimonies often shape the perception of this historical period in Manchuria. Moreover, it sheds light on how engagement in relief work contributed to the elevation of these women as active and influential religious figures within a foreign context.