Can someone pls help me with this question!!

Which battle was one of the most devastating for

The pullman strike resulted in eugene debs receiving a pardon for his involvement. the company losing very little money. the company rehiring workers that withdrew from the union. other companies handling strikes themselves instead of going to court.

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?