 The "Wright Flyer" biplane of 1903 became the first successful powered aeroplane.Throughout the pioneer years, both biplanes and monoplanes were common, but by the outbreak of the First World War biplanes had gained favour after several monoplane structural failures resulted in the RFC's "Monoplane Ban" when all monoplanes in military service were grounded, while the French also withdrew most monoplanes from combat roles and relegated them to training.During the period from 1914 to 1925 most new aircraft were biplanes but from 1917, the Germans began experimenting with a new generation of monoplanes such as the Fokker D.VIII that might have ended the biplane's advantages earlier had the war not ended when it had.