Did you know…
How many aircraft did the Luftwaffe have for the western offensive in May 1940?
Short answer
The Luftwaffe assigned almost 2,000 combat aircraft to Army Group B, plus more than 500 transports and gliders for that same invasion, and more than 3,000 combat aircraft to Army Groups A and C. Combined, that was almost twice the Allied air force.

Almost 2,000 aircraft for Army Group B
Army Group B was assigned almost 2,000 combat aircraft to support its invasion of France, plus more than 500 transport aircraft and gliders. The first phase of the offensive was titled Fall Gelb (Case Yellow), also known as the Manstein Plan. Its object was the invasion of France and the Netherlands.
More than 3,000 for Army Groups A and C
Army Groups A and C were assigned more than 3,000 combat aircraft. Combined, the force gathered was almost twice the size of the Allied air force.
What lay opposite in the Netherlands
The Dutch Luchtvaartbrigade had about 155 aircraft, 125 of them in serviceable condition and 74 of them biplanes. Of the 28 Fokker D.XXI operational, by the end of the fighting only eight were still airworthy.
More questions

Aviation history
What was special about the Vertol 76?
Vertol's VZ-2 tested the tiltwing concept for vertical take-off and landing. After ground trials beginning in April 1957, it first took off on 13 August only… more…

Aviation history
Which was the most-produced American fighter of the Second World War?
The Republic P-47 Thunderbolt, of which 15,636 or 15,683 units were built, depending on the source. It was also one of the heaviest fighters of the conflict… more…

Aviation history
Who flew the E-66 at 2,149 km/h?
Konstantin or Vladimir Kokkinaki, depending on the source. Konstantin is credited with the absolute record on a closed 100 km circuit, at 2,148.66 km/h, set… more…

Fly-by-Owen (CC BY SA), vía commons Aviation history
How many I-11Bs were built?
Between 208 and around 450, depending on the source: one of the AISA I-11 reference sheets gives 208 examples built, while All-Aero speaks of around 400 built… more…

Aviation history
How many HH-53s could be converted to Pave Low III?
Eight HH-53C aircraft received an improved systems package and were redesignated HH-53H Pave Low III. The other figure in circulation, nine MH-53H and 32… more…

SCDBob (CC BY SA), vía commons Aviation history
What did the A129 Mangusta's armor protect?
The fuselage: the A129's airframe is armored and, according to All-Aero, designed to protect against 12.7 mm rounds, with partial protection against 23 mm… more…