 Complete the following phrase:  During 1920, the Polish Air Force heavily benefited from an extensive re-armament and expansion programme headed by General Włodzimierz Zagórski, under which the formation of dedicated bomber regiments was envisioned. Accordingly, an order was placed for 32 French-built Farman F.68 BN.4 Goliath twin-engined night bombers, with which it was intended to equip and launch these squadrons. An additional pair of army co-operation squadrons were repurposed as light bomber units instead, equipped with French Potez XV B2 aircraft. Unfortunately, Zagórskis reforms were abandoned following the 