I was reading an article about those Battles in Italy and Historians debate as to just how many battles comprised the Isonzo? Undeniably innumerable one battle often appeared to merge into another. The last one I believe was at Caporetto in October 1917. So How many Battles at Isonzo??? 12 Battles seems the more appropriate I think.

I have it down as 12 as well:

http://www.xs4all.nl/~aur/Battlefields/italytravel.htm

Breaking down thus:

Battle Started Ended appr. Initiated by
1st 23-06-1915 07-07-1915 Italy
2nd 18-07-1915 10-08-1915 Italy
3rd 18-10-1915 14-12-1915 Italy
4th 10-11-1915 14-12-1915 Italy
5th 11-03-1916 16-03-1916 Italy
6th 04-08-1916 16-08-1916 Italy
7th 14-09-1916 17-09-1916 Italy
8th 09-10-1916 12-10-1916 Italy
9th 31-10-1916 04-11-1916 Italy
10th 12-05-1917 05-06-1917 Italy
11th 18-08-1917 01-09-1917 Italy
12th 24-10-1917 10-11-1917 Austria-Hungary / Germany

Regards,

Marco