In connection with his work on military medicine, he developed an instrument to immobilize a broken arm or leg during the transport of a wounded individual.
In July, Appia traveled to Italy and ended up working in field hospitals in Turin, Milan, Brescia and Desenzano del Garda.
He distributed copies of his treatise to the Italian and French doctors, organized the collection of necessary materials, and sent letters to his friends in Geneva requesting the donation of funds to assist the wounded.
At the Saint Phillippe Hospital in Milan his invention for transporting patients with broken bones was successfully tested on a wounded lieutenant.
Here he completed his treatise with the assistance of his friend Dr. Théodore Maunoir and published it as a book with the title "The Ambulance Surgeon; or, Practical Observations on Gunshot Wounds" (Der Feldchirurg oder einige praktische Studien über Schußverletzungen).
He was also awarded the "Medal of the Saints Maurice and Lazarus", the second-highest decoration of the Kingdom of Italy, for his medical work during the Austro-Sardinian War.
For Barton, who had not heard of the ideas of Henry Dunant, this conversation became crucial in prompting her efforts after her return towards the founding of the American Red Cross and the US accession to the Geneva Convention.
He also supported Clara Barton's idea to expand the mission of the Red Cross societies to deal with the victim of natural disasters and epidemics.