Complex sentence: The "Ham & Lima Beans" entree was considered unlucky by US Army Soldiers, who called it "Ham and Motherfuckers" because they believed that even saying the full name of it brought bad luck.
Split into simpler sentences: The "Ham & Lima Beans" entree was considered unlucky by US Army Soldiers. It was called "Ham and Motherfuckers" because they believed that even saying the full name of it brought bad luck.