How long did it take Europe to "gobble up" virtually all Africa south of the Sahara.

From 711 AD up until 1492 AD, Muslim African Moors overcame and ruled Spain. The Great Mosque of Córdoba, considered one of the world's architectural phenomena, is an evidence of this conquest. It still stands today although in a ravaged state.

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.