This is the first volume of a new collection dedicated to the evolution
of techniques and materials used by special services and special forces.
In October 1940, the British Intelligence Service tested the lower
filtration means in occupied France by parachuting blind man Phillip
Schneidau near Montigny, on the edge of the forest of Fontainebleau.
The British parachute would then quickly establish itself as one of the
main infiltration methods and was adopted by the Allies, including the
American Operational Groups in Jedburgh, and OSS (Office of Strategic
Services, the precursor of the CIA).
This study will focus on parachutes Type A and X. Its successor, the PX
type, is also discussed and made to better understand the differences
and developments.