It is the "National Labor Relations Board" that acts as a mediator in disputes between unions and employers, since many people on both sides of the dispute often claim that the other side is acting unjustly, especially when it comes to negotiations.
I think it would be the first one
The American Civil War was a civil war fought in the United States from 1861 to 1865, between the North and the South. The Civil War began primarily as a result of the long-standing controversy over the enslavement of black people
