My father was in the Army Signal Corps, and at Monte Cassino. Luckily, he survived, and made it to Naples. Got a photo of him in his Army uniform, with Mt. Vesuvius in the background belching black smoke.
I'd recommend "Monte Cassino: The Hardest-Fought Battle of World War II" by Matthew Parker. The section about General Clark and the Rapido River is horrifying.
is he still around?