In the Italo-Turkish War or Turco-Italian War Italy defeated the Ottoman Empire in North Africa in 1911-12.  Italy easily captured the important coastal cities but its army failed to advance far into the interior. Italy captured the Ottoman Tripolitania Vilayet (province), of which the most notable sub-provinces (sanjaks) were Fezzan , Cyrenaica , and Tripoli itself. These territories together formed what became known as Italian Libya . The main significance for the First World War was that this war made it clear that no Great Power appeared to wish to support the Ottoman Empire any longer and this paved the way for the Balkan Wars . Christopher Clark stated: "Italy launched a war of conquest on an African province of the Ottoman Empire, triggering a chain of opportunistic assaults on Ottoman territories across the Balkans. The system of geographical balances that had enabled local conflicts to be contained was swept away." 
During WW1, the Nepalese army was expanded and six new regiments, totaling more than 20,000 troops—all volunteers—were sent to India, most of them to the North-West Frontier Province, to release British and Indian troops for service overseas. Simultaneously, the Nepalese government agreed to maintain recruitment at a level that would sustain the existing British Gurkha units and allow the establishment of additional ones. The battalions were increased to thirty-three with the addition of 55,000 new recruits and Gurkha units were placed at the disposal of the British high command for service on all fronts. Many volunteers were assigned to non-combat units, such as the Army Bearer Corps and the labour battalions but they also were in combat in France, Turkey, Palestine and Mesopotamia. The Rana prime ministers urged Nepalese males to fight in the war. Of the more than 200,000 Nepalese who served in the British army, there were some 20,000 Gurkha casualties included above with the British Indian Army . 
World War one was pretty much a domino-effect where one thing led to the other. Austria-Hungary decided that the death of their heir was directly the fault of the Serbian government and used the opportunity to declare war on Serbia. Russia had a defence treaty with Serbia and rushed to their aid. Germany sided with Austria-Hungry against Russia, causing France to enter the war as they had a treaty with Russia. Britain, who had an alliance with Belgium were drawn into the war as Germany had to get through Belgium to attack France and so it went on.