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.
Gas and Flame Attack-National Archives Photo courtesy of Indiana War Memorial. The stalemate of WW1 left men caught in trenches for months and months. Gas usage had been considered uncivilized, but the French resorted to its usage in August, 1914 in an attempt to rout the Germans. Unfortunately, the Germans were the first to give gas warfare serious development and it became used extensively before the war was over. The first use of gas warfare by the Germans was January 3, 1915 and was dispersed by an artillery shell.