Short answers, pulled from the story.
The German invasion of the Netherlands began on the 10th of May 1940. On that morning, Kampfgeschwader 4 traversed Dutch airspace and paratroopers landed near airfields between 04:30 and 05:00 local time.
By May 1940, the Royal Netherlands Army possessed only 39 armoured cars and five tankettes. Their air force operated a fleet of 155 aircraft with only 125 operational units available for combat.
Hitler decided on the 17th of January 1940 to conquer the whole of the Netherlands because Hermann Göring needed the Dutch airfields against Britain. The plan Fall Festung aimed to capture the government at The Hague using paratroopers.
The battle lasted from the 10th of May 1940 until the surrender of the main Dutch forces on the 14th of May. Dutch troops under French command in Zealand continued to resist until the 17th of May when Germany completed its occupation.
German airborne forces landed near airfields around The Hague and captured the Willemsbrug bridge over the Nieuwe Maas in Rotterdam. They also attacked the military airfield of Waalhaven while securing bridges at Dordrecht and Moerdijk simultaneously.