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.
Serbian nationalism increased tensions within Europe before World  War I. Serbia wanted to create a pan-Slavic state in the Balkans  which included Bosnia-Herzegovina, held â¦ by Austria-Hungary. Serbia  was allied with Russia and Austria was allied with Germany. Russia  allied with France. A war between Serbia and Austria threatened to  involve the whole of Europe.