The situation of the Romanian tanks is known, however. Before "Operation Uranus", the 1st Romanian Armoured Division consisted of 121 R-2 light tanks and 19 German-produced tanks (Panzer III and IV). All of the 19 German tanks were lost, as well as 81 of the R-2 light tanks. Only 27 of the latter were lost in combat, however, the remaining 54 being abandoned after breaking down or running out of fuel. Ultimately, however, Romanian armoured warfare proved to be a tactical success, as the Romanians destroyed 127 Soviet tanks for the cost of their 100 lost units. Romanian forces destroyed 62 Soviet tanks on 20 November for the cost of 25 tanks of their own, followed by 65 more Soviet tanks on 22 November, for the cost of 10 tanks of their own. More Soviet tanks were destroyed as they overran the Romanian airfields. This was accomplished by Romanian Vickers/Reșița 75 mm anti-aircraft guns, which proved effective against Soviet armour. The battle for the German-Romanian airfield at Karpova lasted two days, with Romanian gunners destroying numerous Soviet tanks. Later, when the Tatsinskaya Airfield was also captured, the Romanian 75 mm guns destroyed five more Soviet tanks.