A few weeks ago I went to my family's old mountain house and I found a very old picture of a man wearing a World War 1 uniform and wielding a rifle, so I asked my uncle who it was. He told me that was my grand grandfather who fought for Francis Joseph in the Austro-Hungarian Empire and got called to arms in 1914. He got wounded and captured by Russian soldiers a few months later, but he managed to go back home in 1919 or 1920.
Then I remember asking my grandmother once, if her grandfather was called to arms in 1914 as well, and she told me that my other grand grandfather Attilio was called to arms in 1914, again fighting on the eastern front for the Austro-Hungarian Empire and came back in 1918 unharmed. Back in the days, this part of northern Italy where I currently live still belonged to the Austro-Hungarian Empire and it was only after World War 1 that it got annexed by Italy, so no wonder they were loyal to the Kaiser Francis Joseph. I even recall finding a picture of Francis Joseph himself at my old mountain house
I think I could even go and ask my grandmother for more details about my grand grandfather, I'm sure she does know way more than what she's told me so far!
EDIT: I did some research, and it looks like they served in the Kaiserjäger 3. Regiment
http://de.wikipedia.org/wiki/K.u.k._Kaiserj%C3%A4ger