What gave the new armies the ability to defeat armies of knights?

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?

If any state tribunal decides a federal question and the litigant has no further remedy within the state court system, from which of the following remedies could the litigant possibly benefit? a. a hearing by a us district courtb. a hearing by a federal court of appealsc. a hearing by the us supreme courtd. a congressional vote b, the correct one!

Do you think the fascist nations of the axis powers could have been stopped? could the world war 2 be prevented?