They forced nations to go to war I think.
Answer:
My dearest wife,
I've been through hell and lived to tell the tale. I cannot wait to crawl back into your arms, having witnessed this... massacre...friends dying left and right, brothers screaming for help...but only the roar of the guns was heard.
It's been the largest number of casualties I've even seen in my life...and oh God... I hope no one ever sees hell like this again.
We, the Union, have somehow defeated general Lee, and stopped the invasion.
I hope to see you soon,
Yours forever, Erik
A Ghetto, was the location were Jews during the WW2 were marginated, as the expression of an anti-semitic racial policy of Adolf Hitler that became institutionalized.
Most of the Ghettos were established all over Germany, Poland, parts of France. There the conditions for a living were extremely bad: they lacked the most essential things for a living. Many didn't have good energy and water supply. The security of the neighborhood is also compromised. Many unrest can happen and there is little to be done as authorities will not care. As leaving a Ghetto was illegal, the people escaping them were systematically executed.
Perhaps the most representative Ghetto is the nowadays Warsaw Ghetto, that serves as museum and memorial for Nazi crimes against humanity. This Ghetto once had almost half a million people living on it.
Below you can see how many Ghettos mostly in East Europe were later transformed into Death Camps: