Answer:
I THINK THE ANSWER IS A BECAUSE IT GOES WITH OTHE BRANCHES
The term for someone who lives in the United States, but plans to return to their homeland is alien.
An immigrant is someone who plans to move permanently to the US.
The Byzantine Empire, also referred to as the Eastern Roman Empire and Byzantium, was the continuation of the Roman Empire in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinople (modern-day Istanbul, which had been founded as Byzantium).
They lost so many laborers.