http://en.wikipedia.org/wiki/Long_Range_Desert_Group
http://www.lrdg.org/ The Real Rat Patrol. WW1 and WW2

Check them out and anyone like to do a war game or RPG based on the concept, it
need not be historical.

There is many like units in many worlds armies that do a lion share job, but
with a small membership.

From Texas Rangers working during the Mexican-American war, doing infiltration
and recon, to Phillipino Scouts doing coast watching, prisoner rescue and pilot
recovery, and OSS and like doing infiltrations, support for local resistance
group to Cossacks operating in Russia using horses.. But most also did raids
and such, keeping the enemy off their feet, with serious major risk to life,
limb and home. Especially locally based behind the lines local groups,
Phillipino Scouts being a classic and well as Free French and even a small
German Resistance. German resistance was not large, the Gestapo was very
efficient, but it existed and was not just disenfranchised General Staff
Officer..

Rangers - one or more man units who ranged the border between England and either
Scotland or Wales, keeping the Welsh or Scots from stealing cattle as well as
poucher down.

Mike