Hi everybody.... I have some problems with punctuation.....Do I need a comma in the following sentence?
By the middle of the twentieth century, England witnessed a sudden increase in immigration. Is this comma ok?
And another question: Is it ok to say move into a country? p.e. in the following sentence:
All those people seemed to have forgotten that they were moving into a country threatened by warfare and were thus very disapointed about the encountred situation.
Hope the rest of my sentences is also correct, or if not someone could tell me

Would be great if someone could help me...Thank you....
