In Holland and in Crete the German Air Force parachute troops were supported by army air-landing troops. It is believed that in any considerable undertaking the XIth Air-Borne Corps would be supported by army air-landing troops. Any ground troops can be pressed into such service, but, preferably, air-landing troops are taken from among the best infantry and mountain regiments, if possible only from combat regiments. Troops may be loaded into transport planes or even into gliders without having been previously trained in emplaning and deplaning. The Germans are quite prepared to do this on a mass basis.