The Luftwaffe gained air superiority early in the campaign. By destroying communications, the Luftwaffe increased the pace of the advance which overran Polish airstrips and early warning sites and causing logistical problems for the Poles. Many Polish Air Force units ran low on supplies, 98 of their number withdrew into then-neutral Romania. The Polish initial strength of 400 was reduced to just 54 by September 14 and air opposition virtually ceased.
The Luftwaffe forces consisted of 1,180 fighter aircraft: 290 Ju 87 Stuka dive bombers, 1,100 conventional bombers. In total, Germany had close to 4,000 aircraft, all up to modern standards. Due to its prior participation in the Spanish Civil War, the Luftwaffe was probably the most experienced, best trained and best equipped air force in the world in 1939.
