Which was a direct consequence of world war 1

The Second World War

Explanation:

While the First World War left many consequences in all the halls of life, especially in European countries. We can say that the main consequence is the beginning of the Second World War. The end of the first war, left in a bad moral and economic position to the central powers, this led to a great resentment in these countries and with it the birth of extreme nationalism, all this led directly to the outbreak of the Second World War.

Why that would be World War 2 of course! : P

The Germans had a strong lust for revenge after the "Treaty of Versailles".