Avia B-71 (Tupolev SB 2M-100) in Bulgarian service
With the demobilisation of the former Czechoslovak Air Force, Bulgaria purchased 24 B-71's in late 1939, with another 8 being delivered in 1940.
The B-71 was the Czechoslovak licence-built model of the Tupolev SB. 60 aircraft had been delivered from the Soviet Union, but by the time of the German take-over of Czech lands no locally produced aircraft had been delivered. In all probability the Bulgarian fleet would have contained more Soviet assembled than Czech built aircraft.
The only combat action of the Bulgarian B-71's as an Axis power was against the Greek rebellion in Bulgarian-administered Greek territories in September 1941. Bulgaria took no part in the war against the Soviet Union, and so the B-71's were never used against the nation of their designers.