In rete qualche cosa si trova ma devi cercare siti in inglese. su wikipedia cè una buona pagina sulla 101° e una sui pathfinder, da cui ti ho copiato la bibliografia.
ma su un sito americano avrai qualche spunto in più: http://spearhead1944.com/amerpg/amer101.htm
Infatti qui fanno una distinzione tra Reconnaissance Platoon:

Division Reconnaissance Platoon:
3 officers and 61 men.
2 Reconnaisance Sections (jeeps w/.50 cal MG)
1 Mortar Squad:
1 Pioneer and demolition squad
3 officers and 61 enlisted men.
e Pathfinder
Pathfinders:
Pathfinder teams would drop about an hour ahead of the main force and use
their equipment to help guide in the rest of the unit. Teams were made up of
9-14 signallers with two Eureka ground radar sets and nine Halifane lights, and a 5-man security detachment. The lights were to be set out in a "T", with a different color for each drop zone (DZ), with the tail light flashing out the letter of the DZ in Morse code.

There were usually three sticks of Pathfinders per Regiment.

The Base Stick (2/501) and the Primary Stick (1/501) landed on DZ D
at Normandy. The alternate stick (3/501) landed near Hiesville at DZ C.

A quanto ho capito, leggendo su un sito, (che ometto perchè è dove vendono un elmetto con la "R")i pathfinder si trovavano in ogni unità* e si lanciavano per primi per saggiare il terreno e poi segnalare la zona lancio.
Il Reconaissance invece era un plotone che oggi verrebbe detto "acquisizione obiettivi" e in particolarmodo in Overload servivano a individuare i carriarmati tedeschi per poi trasmettere le coordinate alle batterie alleate.:WW2 Unit History-Bastogne:

Convoying supplies to Bastogne on 19 December, the 426th Quartermaster Company was ambushed and subsequently diverted to VIII Corps' control until 27 December.42 The division was, in effect, without normal supply operations during the entire period. Further complicating matters was the loss of the division's reconnaissance platoon on 22 December. The platoon had been used to establish an antitank warning net and had called for and directed field artillery fire to destroy German tanks. But on leading a cut-off artillery battalion to safety at Neufchà¢teau, the platoon was isolated and would not return until 28 December.







1.^ Huston, James A. "Out of the Blue." West Lafayette, Indiana: Purdue University Press, 1998, p. 23, 29.
2.^ Smith, Carl and Mike Chappell. "U.S. Paratrooper 1941-45." Osprey Military Warrior Ser. 26. Oxford, UK: Osprey Publishing Ltd., 2000, p. 50.
3.^ Rottman, Gordon. "U.S. Airborne Units in the Mediterranean Theater 1942-44." Osprey Battle Orders Ser. Oxford, UK: Osprey Publishing Ltd., 2006, p. 64, 67, 67, 75, 80, 83.
4.^ Moran, Jeff. "American Airborne Pathfinders in World War II." Atglen, Pennsylvania: Shiffer Military History, 2003, p. 28, 31, 32, 33, 70, 70, 76, 77, 83, 89, 90, 91, 91, 92, 92, 92, 94, 94, 94.
5.^ Zaloga, Stephen J. "U.S. Airborne Divisions in the ETO 1944-45." Osprey Battle Orders Ser. 25. Oxford, UK: Osprey Publishing Ltd., 2007, p. 65, 70, 72, 73, 74, 73.
6.^ Ambrose, Stephen. "D-Day, June 6, 1944: The Climactic Battle of World War II." New York: Simon & Schuster, 1994, p. 196, 223, 216.
7.^ http://www.campbell.army.mil/newinterne ... sp?uid=102
8.^ http://www.benning.army.mil/airborne/pa ... /index.htm
9.^ https://www.benning.army.mil/wtc/wtc/b/pf/index.htm
10.^ http://www.bragg.army.mil/2-82AVN/LRSD.htm
11.^ Charles H. Doyle and Terrell Stewart. "Stand in the Door!: The wartime history of the 509th Parachute Infantry." Phillips Publications, P.O. Box 168, Williamstown, NJ 08094
12.^ Jeff Moran. "American Airborne Pathfinders in World War II." Schiffer Publishing Ltd., 4880 Lower Valley Road, Atglen, PA 19310