The main motivation for Greek colonization throughout the Mediterranean basin was "<span>a. The strained resources of the mountainous Balkan Peninsula," since this area provided a vast amount of natural resources. </span>
They refused to baptize native concerts into the Christian faith
Apparently, all of the names on the map are Irish, so the map suggests that Irish immigrants may take over the United States by the 1900s.
You may well be right about people's fears that immigrants, lots of them from Ireland, would overrun the country. Look up when the potato famine was, though. The map may be from the early 1900s, but, if so, not about the potato famine in Ireland.