Important wars of human history

First Balcan war

Period: Oct 12, 1912 to May 10, 1913

One side: Greece, Serbia, Montenegro and Bulgaria (Winning side0
Second side: Turkey

Second Balcan War

Period: Jun 29, 1913 to Jul 29, 1913

One side: Greece, Serbia (Winning side)
Second side: Bulgaria

World War I

Period: Jun 28, 1914 to Nov 11, 1918

The Triple Alliance of Germany, Austria-Hungary, and Italy (the Triple Alliance was only defensive in nature, allowing Italy to stay out of the war until April 1915, when it joined the Allied Powers after its relations with Austria-Hungary deteriorated)
The Triple Entente consisting of France, Russia, Britain and later join them Greece and Italy (Winning side)

World War II

Period: Sep 1, 1939 to May 1, 1945

Axis: Germany, Italy, Japan
Allies: United States, Soviet Union,United Kingdom,China and later Greece (Winning side)