STORY!
A Special devision of North American mercinaries were drafted to Italy, they were a select mercinary devision called "Iron Fingers" The direct translation for the Italians were "Ferro-Dita" and the name stuck. The devision were trained heavily in Hand to Hand combat, and Blade, they fight for the uprising of justice, and order.

If you go type "Iron Fingers" In any English/Italian translation, you will get "Ferro-Dita" So that would make our tag [Iron] If translated into english.
Which is also not taken any way you slice it by the way