stood in the middle: acknowledging the benefits of mobility but unwilling (and unable) to invest heavily in the expensive and unproven new inventions, it turned to cavalry, which the Polish Army considered its elite corps. During the September Campaign, the Polish Cavalry would prove to be much more successful than anybody, the Germans included, could have anticipated. Polish Cavalry brigades were used as a mobile infantry and were quite successful against German infantry. Cavalry charges were rare but successful, especially when used against infantry in un-entrenched positions. However, while Polish cavalry matched German panzers in speed and anti-infantry effectiveness, in the end it simply could not stand its ground against tanks. Among the interesting equipment Polish forces used with success was the 7.92 mm Karabin przeciwpancerny wz.35 anti-tank rifle. It was quite successful against German light tanks, although, as with most of modern Polish equipment, production was just beginning when the war started, and thus wasn't fielded in numbers large enough to significantly change the outcome of the war. Tanks TK-3 and TKS, tankettes 7TP, a light tank Anti-tank gun Bofors wz.37 Polish Air Force The Polish Air Force was at a severe disadvantage against the Luftwaffe. Although its pilots were highly trained, the Polish Air Force lacked modern fighter aircraft, and the Germans had gross numerical superiority: Poland had approximately 400 modern and semi-modern aircraft (and another 400 obsolete transport, recon and training aircraft), including 169 fighters, and Germany had approximately 3,000 aircraft (albeit only half that number on the Polish front, with most of the remaining similarly as obsolete as the second 400 Polish aircraft). The Polish Air Force development program was slowed in 1926 in the aftermath of Józef Piłsudski's May coup d'état, as Piłsudski considered the air force to be of less importance than other military branches. In 1939, the Polish main fighter, the PZL P.11, designed in the early 1930s, was becoming obsolete. The slightly better PZL P.24 was used solely for export, and PZL.50s and several other projects, which were supposed to have better parameters than contemporary German fighters, were still during prototype's tests. As a result, the German Messerschmitt Bf 109 and Bf 110 fighters were faster and better-armed than anything the Poles had in 1939, and most German bombers could also outrun the Polish fighters. On the other hand, P.11s were more maneuverable, and despite the German superiority in speed, armament and