My Italian grandfather didn't fight in the war - but two of his older brothers did (one in the Phillipines, one in France and Germany). Instead, he was given an agricultural deferment. I found it this weekend while home visiting my 91-year-old grandmother. I don't know how he felt about not serving in the military during the war - it was something I never asked him, and as he passed away in 2008, I probably will never know.
However, with so many men off serving, there was a critical need for farm laborers here in the United States. The US needed to feed all those troops - plus we were helping other countries by sending food, and would do this well after the war was over. High school kids and women were recruited to help. When German and Italians POWs were brought to America, they were put to work in the field, adding a vital labor source.