Bangladesh, Aug. 26 -- A trove of leaked corporate records has revealed that Belarus, despite being a formal military ally of Armenia through the Russian-led Collective Security Treaty Organization (CSTO), provided weapons systems to Azerbaijan that were later used to shoot down Armenian drones during the bloody 2020 Nagorno-Karabakh war. The revelations, published by the Organized Crime and Corruption Reporting Project (OCCRP) in collaboration with Hetq in Armenia and Buro Media, shed light on a secretive arms trade that not only deepens mistrust between Yerevan and Minsk but also underscores the fragility of alliances in the post-Soviet space.

The leaked documents come from Tetraedr, a Belarusian private arms manufacturer that has long...