Complete the following sentence: The R-1 and R-2 were heavily used by the Soviet Air Forces through the 1920s as its standard light bomber and reconnaissance aircraft.<unk> Complete the following sentence: The R-1 and R-2 were heavily used by the Soviet Air Forces through the 1920s as its standard light bomber and reconnaissance aircraft. 1926,1927,<unk>1927,<unk>1926,<unk>1927,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1926,<unk>1927,<unk>1926,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1927,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1927,<unk>1927,<unk>1926,<unk>1927,<unk>1926,<unk>1926,<unk>1927,<unk>
<unk> <unk> <unk> R-1s and R-2s were also used in support of operations during the Basmachi Revolt in central Asia.