Answer :
The main causes are
- The main cause was the battle of Balkan since 1912.It raised the fire between and Axis powers and Allies.
- The partnership between UK and France in 1906 against Germany raised the temper of Germany and Italy.
- The battle to occupy territories in Morocco is also a reason.
- The stopping of Serbian ships in Mediterranean sea by Austria.
- Then the murder of Austria's prince burned the flame and world war 1 was began
Allied forces won ww1