 On 11 July 1945 Lt. Gen. Połynin ordered that all national marks on aircraft be changed to Polish chessboards.Up to this time all machines were painted like aircraft of the Soviet Air Force with additional Polish chessboards on the sides of planes (the width of the Polish mark was between 300 mm and 350 mm so it was slightly bigger than marks used by the Polish Air Force in Great Britain).Also the structure was gradually changed.