The Polonez[1] is a Belarusian 300 mm rocket artillery system of a launcher unit comprising eight rockets packaged in two four-rocket pods mounted on a MZKT-7930 vehicle.[2] In 2018, it was exported to Azerbaijan.[3][4] The system was designed by the Belarusian Plant of Precision Electromechanics in cooperation with a foreign country, probably China. The first combat missile launches were carried out in China.[5] The 77th Separate Rocket Artillery Battalion of the 336th Rocket Artillery Brigade of the Belarusian Ground Forces is equipped with it.[6] An upgraded version called Polonez-M passed all trials and has been accepted into service by the Belarusian Ground Forces as of May 2019. Polonez-M has an increased range of 290 km (186.4 mi), a higher share of domestic components and can fire the improved A-300 missile.