When the roman empire fell, europe became more vulnerable to invasion. invaded from the north, magyars from the east, and from the south. in response, a system developed in europe. this system involved peasants exchanging their work, their land, or their freedom for protection from the invaders. the of the manor was responsible for providing this protection.

1-Vikings, 2-Muslims, 3-Manor, 4-Lord

Explanation:

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.