The causes of the war: During the period of uneasy peace in Europe at the end of the 19th century, there had been various sources of tension.
-Grance wanted to recover the region of Alsace-Lorraine, which it had lost to German Empire in 1871.
Between 1878 and 1908, the Astro-Hungarian Empire occupied and the annexed Bosnia-Herzegovina. This led to nationalist protests on the part of Serbians living in Bosnia. It also angered Russia, Servia´s transitional ally.
-Industrialised European countries expanded their empires and competed for control of colonies, especially in North Africa.
-Britain and Germany became involved in a naval arm race. Both countries but a range of powerful new battleships known as dreadnoughts.
As a result of these disputes, two alliances were established