seaplanes During World War I, 269 Russian aviators were awarded the St. George military decorations (St George Sword, Order of St. George or Cross of St. George), 5 aviators were awarded the Chevalier's National Order of the Legion of Honour, 2 aviators were awarded the Military Cross, 2 aviators were awarded the Order of the White Eagle and many others were awarded medals. 26 aviators became flying aces of Russian Empire. The most successful Russian flying ace and fighter pilot was Alexander Kazakov, who shot down 20 enemy aeroplanes. However, the war was not going well for Russia and following significant setbacks on the Eastern front, and the economic collapse in the rear, military aircraft production fell far behind Russia's rival Germany. After the February Revolution of 1917 the Imperial Russian Air Service was reformed. Following the October Revolution of 1917, the Russian Air Service was dissolved. more than 1300 aeroplanes became a basis of Workers' and Peasants' Air Fleet. More than two-thirds of these aeroplanes were foreign-made. More than 50% of all aeroplanes were "Nieuports", more than 15% of all aeroplanes were "Farmans" and about 9% of all aeroplanes were "Voisins". Only 300–350 of these aeroplanes were used during Russian Civil War because of the lack of spare parts and maintenance problems. Kolchak's white army received 65 aeroplanes and about 70 pilots. Also, former members of Imperial Russian Air Service joined Denikin's white army. After the start of the North Russia Intervention several former pilots of Imperial Russian Air Service joined the white forces in North Russia. 219 pilots who fought in Red Army during Russian Civil War were awarded Order of the Red Banner (16 of them were awarded twice). Almost all of them were former pilots of IRAS. Command structure At the beginning of the war the basic Russian unit was the Otryad (or Squadron). Originally, these consisted of only six aircraft, but this was soon increased to ten, with two machines held in reserve. These Otryads were put together into Groups of three or four and, like their German counterparts on the Western Front, moved to strategic points on the Front where and when they were needed. Even larger groups of aircraft called Istrebitelnyi Divisyon (fighter wings) were attached to each Field Army. Constituent units of the IRAS As the war progressed, aviation detachments were grouped into larger units: 1st Battle Aviation Group (1-я боевая авіаціонная