Leading up to World War I, there was a naval arms race in Europe. With this race introducing many innovations to navies across Europe, in 1906 the British unveiled a revolutionary new warship called "HMS Dreadnought" powered by steam turbine. This ship reached a speed of 21 knots, one of the fastest at the time; this warship also had advancements in weaponry that no other nation's navy had at the time. With this, the arms race changed to which nation could build the most of those newly made warships. With these new, heavily-armed ships the Allies had more opportunities for blockades in the various theaters of the war.