They had to face war. Slavery and stuff like that.
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They faced the world ;)
All the extra coats lying around.
Emigrating to a new country can pose any number of problems. There may be a language problem for instance. Also, getting use to the customs and culture of one's new home nation can be difficult for many people.
They faced New residents and and raw materials for Indrustry
They were similar because they had the same historical background. The areas that they settled were what changed them because there were different challenges to face.