So after visiting the microstate of San Marino this summer I decided to read up a bit on the country and it's people (fancily titled Italians /s). When I checked the page for Sanmarinese people on Wikipedia I noticed a section of their diaspora was included. Now, there are basically just about 50k people of sanmarinese origin in the world today, and of those almost 1.5k live in Argentina. This kind of baffled since argentina is so far away and different in culture from San marino (sure, they are both speak romance languages, but that's pretty much it). I can see why there are significant populations in Italy (obviously), France and the US, but Argentina? I did a lot of searches but all could find was pages giving the same facts without any reasoning behind it.

So does anyone have a clue how this can be? Why does 3% of an Italian micronation's people live in south america? Are they known to have good diplomatic relations? Is there a problem with the definition for Sanmarinese person? Or has someone gotten just gotten the wrong info?