I wasn't allowed to just put 1869 as the start date, and as the finish date, so I dd this to represent the whole year of 1869. These dates are not correct, only the year is, which is the year they finished building the Suez Canal.
World War I
1914 - 1918
1939 - 1945
January 1, 1945 - December 31, 1945
These are not the correct dates either. The date that the United Nations were actually founded on was October 24, 1945.