X. - XII. Isonzo battle and Caporetto breakthrough
1. X. Isonzo battle
12 May 1917 - 5 June 1917
During the winter Italian army strengthened massively and waited until the weather enabled the beginning of the large offensive. They rallied 36 divisons, far more than their opponent. Despite the great superiority of the Italian army, there was no shift on the southern front. Above all, it turned out that the Italians were unable to carry out a key attack. On the contrary it confirmed the success of the Austro-Hungarian defense. In three weeks Cadorna ocuppied only one village near the Karst Plateau.
Source:
FUČÍK, J.: Soča (Isonzo) 1917, Prague-Litomyšl 1999.
FUČÍK, J. / PAVLÍK, M.: Sočská fronta 1915-1917, Prague 2008.
ŠEDIVÝ, I.: Češi, české země a Velká válka 1914-1918, Prague 2001.
X. Isonzo battle - Austro-Hungarian troops return fire
Source:
https://ww1.blogberth.com/2017/05/13/greatwar-1914may-12-1917-tenth-battle-of-the-isonzo-begins/