A fleet carrier is intended to operate with the main fleet and usually provides an offensive capability. These are the largest carriers capable of fast speeds. By comparison, escort carriers were developed to provide defense for convoys of ships. They were smaller and slower with lower numbers of aircraft carried.
The First World War was sparked in the Balkans in 1914 when members of Mlada Bosna, a revolutionary organization with predominately Serbian and pro-Yugoslav members, assassinated the Austro-Hungarian heir Archduke Franz Ferdinand of Austria in Bosnia and Herzegovina's capital, Sarajevo.
In 1914, the Balkans was known as the powder keg of Europe. Serbia  was attempting to create a pan-Slavic state by wresting control of  Bosnia from Austria-Hungary. The otheâ¦r Balkan nations were becoming  more nationalistic, which had led to the Balkan Wars from  1912-1913.