Despite the ambiguous legal basis for the Red Cross' work in this conflict, Junod succeeded to convince the warring parties to sign and implement a number of agreements regarding prisoner exchange and other issues, thereby saving many lives. Before the fall of Barcelona he achieved the release of five thousand prisoners whose lives were endangered by fighting for the city. He also organized research and information exchange regarding prisoners and missing persons using the Red Cross card system for the first time in the context of civil conflict, and by the end of the war the ICRC had facilitated the exchange of five million cards.
