In order to build peace in the world the U.N.O. plays its prominent role as below. The U.N.O. was established on 24th October, 1945.

1.  It prevented the Cold War. 
2.  It succeeded in getting independence to Indonesia from the Dutch.
3.  It solved the dispute in Palestine between Arabs and Jews by creating a separate state of Israel for Jews. 
4.  It succeeded in averting a war between England and Egypt over Suez Canal issue.
5.  It created pressure on Russia and the U.S.A. to the reducing of nuclear weapons. 
6.  It helped Congo to get freedom. 
7.  U.N. helped to defuse Cuban missile crisis, middle east crisis. 
8.  UN sponsored peace settlement ended Iran – Iraq war. 
9.  UN sponsored negotiations led to the withdrawal of Soviet troops from Afghanistan. 
10.  It helped Cyprus to avert conflict between Greeks and Turks. 
11.  When Pakistan resorted to aggression over Kashmir it intervened and tried to avert the war between India and Pakistan.
12.  It helped to Angola to get independence from Portugal. 
13.  So far it has been able to prevent a Third World War.