Answer:
War, religious persecution, Economic crash
Explanation:
The Irish Migration was largely due to religious persecution and economic decline. War could easily cause a migration for fear of personal safety, we have seen an increase in immigrants from Central America and Syria in recent years. Religious freedom is partially what the US was founded on, it continues to be a life or death issue under ISIS and other organization who use religion as an excuse for violence. Economic crash leads to movement based on new opportunities.
They recruited the Rangers to bolster up the militia to defend Georgia.
Answer:
B) Nuclear Warfare
Explanation:
B) nuclear warfare is the most possible answer since both russia and Us had nuclear weapons at the time, and both countries were threatening each other. But were the cold war get hot, I personally believe nuclear warfare wouldn't have happened because of MAD -- Mutually Assured Destruction. If Russia nuclear bombed US, then it was certain that US would bomb Russia and both countries would be completely decimated so there was no point in Nuclear Warfare.