The figures concerning the POWs are in general variable, due to the lack of reliable sources. In any case the largest numbers of prisoners were counted on the Eastern front, and in particular for the Russian and Austro-Hungarian army. This front changed abruptly, with large movements of the armies, in both directions. The French and British army counted less prisoners in their ranks. The Italian army doubled the number of its prisoners after the disastrous defeat of Caporetto. The mortality of the soldiers, in the ironer camps, were by far inferior compared to the officers.