Actually, the paratroopers that took Fornebu airfield and gressholmen flotation plane airport (both near Oslo) simply landed, got out of the planes, and took over the airport. At gressholmen shots were fired, but both airports fell very quickly. When you're at peace, it's not the custom to shoot down unidentified aircraft coming in to land, and before radar, there was only very few minutes available to react and scramble a defence of the airports.
ORIGINAL: fallgelb
The German Paratroopers and Air Landing units were used in three major operations:
1. Units (not over battallion size) of the "Fallschirmjäger Division" in JU52 were Paradropped on airfields in northern denmark, near Oslo and as i remember Stavanger to secure airfields.
2. The "Fallschirmjäger Division" and the 22nd Airlanding Division ("Luftlandedivision, actual an infantry division without heavy weapons, without an artillery regiment and i think with a fourth infantry regiment) were paradropped and landed with gliders on airfields in the netherlands (Rotterdam, Den Haag). In terms of "number of air landed soldiers" a larger operation than the landing on crete. The operation was "one airfield too far" and the troops near Den Haag suffered extrme losses.
3. In the air landing on crete participated the Fallschirmjägerdivision and one or two mountain divisions ás air landing units and in barges.
The Operation to paradropp on malta never occur, because of the extreme lcasualities on crete (as i remember higher than 30%) with the true Private Ryan story among a german Paratrooper "Family".
The 22nd Air Landing Division (from the durch campaign) was reorganized and reequipped as normal infantry Division for Barbarossa and fought in the crimea (as i remember).
In the late war the german Paratroopers were used as light elite infantry units for difficult terrain (like Monte Cassino). Due to Hermann Görings ambitions a paratrooper army was founded in the western theater (about 1944).
Michael