World War 2.
A conflict that lasted from 1950 to 1953.
The Vietnamese
On 1 September 1939, German forces attacked Poland.
It didn't, World War 2 itself broke out in 1939. World War one broke out on the 28th of July 1914.
The first one.
WW2 started in 1939
In 1939 Adolf Hitler broke his promise made at Munich and seized the rest of Czech republic. He also invaded Poland.
There was no large conflict after Nigeria gained independence in 1960. The Nigerian Civil War was their main conflict, however it did not start until 1967
Religious conflicts between the Muslim and the Christians
The conflict was that Japan, Germany, and the United Sates had an argument and that was when World War 2 Broke out (The Pacific).
Winter war (a military conflict between Russia and Finland)